Garmin Forerunner 935 | Full analysis and opinion


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The arrival of the Garmin Forerunner 935 took us by surprise. Announced only three months after the Fenix 5, in this Garmin 935 we find practically the same watch with some slight changes. We could think that it is the low-cost version of the Fenix 5 as it is made entirely of plastic... but nothing is further from the truth. Everything has its reasons.

So what is this Garmin FR935 and how does it fit into the range? Well, that's exactly what you'll see in this test. If you've already read the one on the Phoenix 5 This one will ring a bell, of course, because the software of both watches is practically identical, but as you can see the differences are in small details.

And as I always like to say, in this test you'll see two different Forerunner 935's. One with a black strap that has been temporarily loaned by Garmin, and the one with a yellow strap (which corresponds to the triathlon pack) that has been bought by me in the store. The first one will be returned directly to Garmin once the test is over (actually, it's already back with them), while the other one will stay with me and I'll use it to solve all your doubts.

Why do I say this? To point out that I do not receive any compensation for performing these tests, so my opinions about the Garmin 935 or any other device I test are my own, without any pressure from the manufacturers.

The way this website is maintained is thanks to your support, so if you like the work I do you can show your gratitude by buying your Garmin Forerunner 935 (or any other product) via Amazon.

I've been testing these FR935s in a wide range of situations for many weeks now, so I've got clear references to all the good things and improvements the new top of the range Forerunner series has to offer, so let's go through all the details of the test.


I had two options when it came to showing you the unpacking of the watch and everything inside the box. Although I'm sure it will sell a lot more the normal version, it's much more interesting to do it with the Pack Tri version because there's a lot more to see.

In this case, this is how the box is presented. Remember, the Tri Pack is the one that includes the watch with the yellow strap. But it is not only the strap, it also has certain details in this same color that we will see later. On the front of the box also indicates, "Forerunner 935 Tri Bundle".

Garmin Forerunner 935 - Unpacking

We make "pop"... and you know, as the commercial of the famous brand of potato chips (which really is neither potato nor fried) says, there's no stopping now.


Garmin Forerunner 935 - Unpacking

But let's go with what's under the first tray. If this were the normal version, this is what we'd find inside. Lots of paper and a sync and charge cable. Ah, also a clock.

Garmin Forerunner 935 - Unpacking

What does the 150 euro difference between one model and another buy us (at least, officially)? Well, all that you see in the next image.

Garmin Forerunner 935 - Unpacking

From left to right, this is what we see.

  • Rapid extraction kit, which I'll explain in more detail hereYou can see the rubber pads for attaching the bracket to the handlebars of your bike, the typical Garmin quarter-turn bracket, and the two complete brackets that you can see in more detail in the link above.
  • HRM-Swim pulse sensorfor swimming in the pool.
  • HRM-Tri pulse sensorBasically it is a HRM-Run sensor with memory for swimming (see links for details).
  • Additional black strap. It's the same as the yellow one but in black. You can put it on the watch if you want it to be more discreet, or place it directly on the quick release holder.
  • Two torx-type screwdrivers for removing the belt pin.

But hey, let's go with the watch. There's no big novelty in its design. Five buttons in the classic Garmin layout and no touch screen.

Garmin Forerunner 935 - Unpacking

There's more news on the back of the watch: first the Garmin Elevate sensor, which is now much smaller and barely protrudes from the back.

Secondly, the new charging connector, which the Fenix 5 has already released and which promises to become a standard connector for the whole range (or at least I hope so).

Garmin Forerunner 935 - Unpacking

It's a smart connector, so it can be connected in any direction.

Garmin Fenix 5 - Unpacking

If you have to put some glue to the new connector is not being able to charge the watch while we are using it, for situations of extreme need of battery (ultras or last moments of an Ironman) Although you can do it wearing the watch in your hand, because it can charge while it continues recording the activity.

Garmin Forerunner 935 - Unpacking

If you've noticed the image, Forerunner 935 is missing the QuickFit strap that was introduced with the Fenix 5. It is compatible with the system and can be purchased as an accessory (either original or compatible, much cheaperalthough he tries to hook it up before swimming in open water)

What are the differences between the normal pack and the Tri pack, besides the included contents? The color of the strap and the accents of the watch.

On the front you can see that the FR935 in black has the main button ring in silver, as well as the small mark on the screen pointing to the Start-Stop button. On the Tri pack model these details are also in yellow.

Garmin Forerunner 935 - Unpacking

In its side view we can also see the same difference in the ring under the bezel, which also has the colors silver or yellow in both versions.

Garmin Forerunner 935 - Unpacking

You've seen, the Forerunner 935 and the Fenix 5 have a lot in common, so let's clear up the differences between the two models before we go any further.

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Garmin Forerunner 935

Garmin Forerunner 935 pack

Garmin Forerunner 935 or Garmin Fenix 5, differences

Obviously, the first thing we have to do is point out what the differences are between the FR935 of the Fenix 5. As I noted at the beginning, in many ways the Garmin 935 is a Fenix 5 in a different body. The software is almost identical, with very slight changes between the two models. Both are at the same height in terms of training possibilities and everything they can do.

In other words, there's nothing the Phoenix 5 can do that the 935 can't do, and vice versa. So... what changes between the two?

  • First and foremost, the material of construction. The 935 is made entirely of plastic. But not "plastic" in a derogatory way, but a material with a good quality feel. Garmin indicates that it is a fiber-reinforced polymer. In fact it's the same material as the Fenix 5 case, only this one has a stainless steel bezel and back cover. The glass is glass, proper. Probably polycarbonate glass (i.e. not mineral), but despite being of chemical origin it is not an easy plastic to scratch.
    The exclusive use of this polymer results in a much lighter watch. The 935 weighs almost half as much as the Fenix 5 (49 grams versus 85), as well as reducing its thickness by just over 1mm. And despite being 47mm in diameter, it feels smaller on the wrist than the Fenix 5, partly thanks to its lightness.
  • While only the sapphire crystal versions of the Fenix 5 have WiFi connectivity, the FR935 has a wireless connection in any of its versions (i.e. the normal one with a black strap or the tri-pack with a yellow strap).
  • The Garmin FR935 is cheaper. At official retail prices the top of the Forerunner range (without pack) is priced at £549 while the Fenix range is priced at £599, rising to £699 if you want it with WiFi (and sapphire glass, of course).
  • There are some differences in widgets and applications. For example, alongside the 935, a Training Peaks application was introduced that allows training on this platform to be imported directly into the clock. But like any Connect IQ application, it can also be installed on other compatible models. The same goes for widgets or dials, there are slight changes. But in terms of software, everything is similar.
  • Another notable difference is that the Garmin 935 has the Quick-Removal Kit, something we don't find on the Fenix 5. This accessory allows you to quickly change the location clock, moving it from your wrist to the handlebars of your bike in a matter of seconds. If you are a triathlete you will know what I am talking about. This is the kit that is included in the 935 tri-pack, which you can see totally detailed in this article I wroteIt is in the tri-pack or can be purchased as an accessory.
  • The Fenix 5 is supplied with a strap (or two if you buy the metal strap version) with the Quickfit system. This strap allows you to quickly change between different models and colours in a matter of seconds. On the 935 we have a normal strap. However both use 22mm straps, so if you wish you can use this type of strap on the 935 as well by buying it separately.
  • There are other small differences, for example the dive rating of the 935 is lower than the Fenix 5, 5ATM versus 10ATM. There is also a slight difference in the UltraTrac mode (10 hours more for the Fenix 5), however the duration with use of GPS and optical sensor is the same for both models.

In short:

  1. The 935 is lighter, at the cost of using materials with less of a "premium" feel.
  2. WiFi is standard on the 935, while on the Fenix 5 you pay separately.
  3. Quick extraction kit available on the 935.
  4. The 935 is 50 euros cheaper.

What's new with Garmin FR935

The Forerunner 935 is, as I said, a model that is derived from the Garmin Fenix 5. And like this one, it is an evolution within the Garmin range and is built on the software of the Fenix 3. Like the Fenix 5, there are a lot of little things that change.

Instead of going point by point through everything on the clock, I want to get to the point. Tell you what these new things are and what each one represents.

There is a new quick access menu to functions, accessed by pressing and holding the upper left button, which on other models was simply used to access the off menu. It now has many more options that you can also configure.

Garmin FR935 - Quick access menu

And combined with the above are the hot keys. It evolves from what was included in the Fenix 3, being able to configure more keys or the combination of two of them.

Garmin FR935 - Quick access menu configuration

Garmin continues to improve the dial configuration options. To the possibility of adding spheres of Connect IQ Garmin's Face It application was joined, with which you could configure the screen by including a photo or your own drawing as a background.

Now you can also manage the dial from the clock itself, changing hands, colours, or changing the additional data displayed on the screen such as steps taken, minutes of activity, floors climbed, etc.

Garmin 935 - Dial Setup

Garmin 935 - Dial Setup

There is also news for the sensors, because both the Fenix 5 and the Forerunner 935 are the first devices from Garmin that support Bluetooth sensors, in addition to the usual ANT+. I will detail this with some more detail in its corresponding section

I've also reserved a section for the new Training Load and Stress, Training Effect and the other advanced metrics which are one of the main new features on the Forerunner 935.

But before we get to those more specific functions, let's take a quick look at all that the 935 has to offer.

Sports and activity measurement on the Forerunner 935

Within the possibilities of sports profiles and their configuration there are no major changes, everything remains virtually intact.

Clicking the top right button will take you to the list of different profiles you have set up. There is a slight change here, as there are two separate sections. At the top you will have the sports profiles you use most, while at the bottom, in a sort of sub-menu, you can have less common profiles as well as Connect IQ applications.

Garmin 935 - Sports menu

Garmin 935 - Sports menu

You can move any profile or application around (a sports profile is still an application), so you can leave it completely to your liking and in the order you prefer.

If you select any of these sports you will enter directly to the data screens, and the search of satellites, pulse and the rest of external sensors (if there are any paired) will start.

Garmin 935 - GPS search and sensors

Do you want to change any parameter of the sport profile? Things like the screens and their data, the alerts or any other parameter. You can do it directly from here, simply by pressing for one second the scroll up button (the one in the middle of the left side), which is the standard way to access the menus.

Garmin 935 - Sports Configuration

Of course, this configuration is still accessible from the general settings, as it has been for a lifetime, but the advantage of doing it this way is that you can make any changes even while you are training, since you don't have to exit to the main menu.

There are not many changes to the data screens, which continue to allow a maximum of four fields on each screen.

The only new thing is that there is an option to configure a screen with three data, but without a descriptive text. The digits will be larger, but you must remember what each of them corresponds to.

Garmin 935 - Display Configuration

As you'd expect, the list of data fields you can select from is overwhelming, both in terms of the number of screens and the list of possibilities you can choose from. And then there are other pre-defined screens, such as race dynamics, virtual partner, compass or music control on the paired phone.

Everything else is standard - alerts for different events (which also support settings), auto lap and auto pause, auto climb to switch to a specific display when climbing hills of a certain degree, etc. There's nothing new - all of this was already present in the Fenix 3, and although these are more specific features of a trail and mountain watch like the Fenix range, Garmin has not eliminated these possibilities in the Forerunner 935.

All of this is present in all of the sports modes, except for the obvious. For example, swimming will behave differently, since there is no speed or pace per kilometer, no screen changes per vertical speed, etc. And no, in swimming there are no screens to climb slopes, I'm sorry to disappoint you.

What I mean is that the configuration possibilities are common regardless of whether you are preparing a cycling, running, hiking or strength training activity.

And since it could not be otherwise in a multisport watch and very focused on triathlon, we can also create sports profiles that include more than one sport. Again everything can be customized, from including the transitions, selecting the order of the sports (including repeating the same sport), or the name you want to give it.

Garmin 935 - Multisport

So not only can you create a sport mode for triathlon, but you can also have specific modes for bike-running block training days.

When creating these multi-sport profiles, you must first have the individual sports configured. When you create a profile with more than one sport what you are doing is joining several of the previously created sports. Therefore you do not need to configure the cycling profile when creating the triathlon profile, it simply inherits all its settings. And I am not talking only about data screens, but also alert settings, lap settings, etc.

If you want to have a profile with specific alerts for training, but that those alerts do not bother you on the day of competition (for example, not to exceed a certain heart rate) you must have two different applications of that sport, for example, a race for training and a race for competition, which will be the one you include in the triathlon profile.

Once the activity has started, you can move on to the next sport by pressing the back button. If you have chosen to have the transitions active, you will count down the duration of the transition to the pit exit, at which point you will press the back button again and move on to the next sport.

Garmin 935 - Multisport

To finish with the sports profiles, remember that the Garmin 935 does not just offer swimming, cycling or bike profiles. There is also hiking, skiing, paddle surfing, golf, etc. Each of these is a specific and adapted mode, not just a stopwatch and heart rate monitoring.

For example, in the golf application you can download course information and see distance to flag, count strokes on each hole, etc. That is very similar to what is offered by a Garmin Approach series.

And the same goes for rowing sports by registering paddles; or in skiing and snowboarding where the clock automatically separates the descents with the times of the ascent. In your activity you will automatically see the descent times with their specific metrics without being altered by the time of the ascent.

After all this fuss, you know all about setting up your watch, so it's time to start training. After selecting the sport you're going to play, your first screen will appear and the search for satellites and sensors will begin.

Garmin Forerunner 935 - Post Activity Altitude Profile

You must wait until the circle turns green, by which time the clock will have a correct triangulation and enough satellites located.

Garmin Forerunner 935 - Satellite Search

Using the left scroll buttons you can switch between the different data screens you have set up, and by holding down the top scroll button you will access the main menu. Here you can also activate the navigation of a route or lap start; or select a workout that you have synchronised on your watch.

Garmin 935 - Training

As it is a watch with a primary focus on multi-sport activities, if you hold down the bottom scroll button you can switch directly to another sport (in this case the behaviour is different to the Fenix 5, as by performing the same operation you would access the time display), indicating the duration of the previous activity.

Garmin FR935 - Change of activity

Pressing and holding the illumination button will take you to the quick access menu.

Garmin FR935 - Quick access

When you are out of the preset zones, the training computer will display the information about the zone you are in, along with other information such as recovery time, laps, records, etc. This information includes time zone graphs and the variation in altitude during training.

Garmin Forerunner 935 - Training Zones

Garmin Forerunner 935 - Post Activity Altitude Profile

Here you will also find the new training effect (which I will discuss in more detail later).

Garmin Forerunner 935 - Training Effect

Garmin Forerunner 935 - Training Effect

This is in the watch, of course when you finish training and synchronizing it (by cable, Bluetooth or WiFI) you can access it in Garmin Connect, visualizing the activity from the web or from the mobile application. And there is really a lot of information to be able to analyze, as you can see in the Garmin Connect user guide here.

Garmin Forerunner 935 - Cycling Activity

If you have used a Connect IQ application, it will also record data if it is ready to do so, for example from muscle oxygen meters or from Stryd's running power meter.

Garmin Forerunner 935 - Career Activity

Let's continue... As with most of the Garmin range, the 935 also has advanced trainings that you can set up directly in Garmin Connect. These must be created via the web, not from the mobile application.

Garmin FR230 FR235 - Advanced TrainingThey will be available on the clock after synchronization, and when it's time to work out, you can review the different steps it's composed of, to refresh your memory of what you're about to do.

Garmin 935 - Advanced Training Steps

When you are doing one of these workouts you will have a specific screen where you control each of the intervals. The top of the screen is reserved for the target interval you have selected: pace, heart rate, watts, etc.

Underneath you will have the rest of the important fields for the interval, like this case target power. And if it is an interval that is going to be repeated several times, you will know which repetition you are in and how many you have left.

Garmin 935 - Advanced Training Steps

This is not the only way to perform advanced training. If you have not created it on the web or want to do something simpler, in the clock menu itself you will find the option to perform easier training.

Garmin Forerunner 935 - Training Configuration

There is also compatibility with Strava segments, not only for cycling but also for race training. This is something that premiered on the 735XT and that I detailed at the time.

And to finish this section (which is already being too extensive), it remains to talk about activity monitoring during the rest of the day. FR935 monitors your daily activity by counting steps against a goal that, by default, is variable. In this way the goal will be adjusted daily to try to demand a little more, although you can also set a manual goal as 12,000 steps per day.

There are more goals to meet, such as minutes of intensity or floors climbed.

Garmin Forerunner 935 - Objectives day

Better than looking at this data on the clock is to open the application on the mobile and see all this information in more detail.

Garmin Connect - My Day

The Garmin 935, like the Fenix 5, features an automatic activity log, called Move IQ, which was first introduced to the brand's activity monitors and allows you to identify activities outside of specific workouts without any user interaction, such as running, walking, elliptical training or swimming, as long as you do so for more than 10 minutes and you do not find it interesting to record individually.

In this example you can see two detected walks in the morning (which I have not recorded) and one swimming activity in the afternoon, recorded manually.

Garmin FR935 - Daily activity

Garmin FR935 - Daily activity

24/7 pulse tracking is another new feature of the Garmin 935, thanks to the evolution of the Elevate sensor. Now the recording is constant, since in the past it was variable depending on the movement. Just compare this image obtained with the 735XT.

Garmin 735XT FC Graphics

Now look at this other graph, obtained in this case with the Forerunner 935.

Garmin FR935 - 24/7 Heart Rate Graph

There are many more points, when before there were many periods when the line was totally flat as it took data every few minutes. The new sensor demands less energy, so it is always on.

It is also possible to check the heart rate graph on the clock, but in this case the data displayed is from the last 4 hours.

Garmin 935 - FC 4 hours

At the top of the graph you can also see your instantaneous pulse, while the digits marked on the graph are the highs and lows in that time period. And if you press the main button you can see the trend of the graph at rest for the last seven days.

Garmin Forerunner 935 - FC 7 days

There's also sleep tracking, of course.

Garmin Fenix 5 - Sleep

A lot of things, right? I hope I could refresh your memory and that you already have a general idea of how Forerunner 935 works (practically identical to the Fenix 5), so now we can get into the new features, treating them in a more specific way.

Performance Metrics

The performance metrics we first saw on the Fenix 5 were its main innovation, its most important function. The same is true for the Forerunner 935.

This star feature, far from being developed by Garmin, is the work of the Finnish company FirstbeatThey've been studying heart rates for many years and much of what Garmin offers is licensed through them. Just take a look at their website to see how many proprietary algorithms Forerunner 935 has to offer.


Garmin Forerunner 935 - Firstbeat

All these new data recorded by the clock are available exclusively there, through a new widget where you will have access to the information.

Garmin Forerunner 935 - Training Status

All data revolves around this training state, which Garmin calls Training StatusEach time you do an activity this screen will change, showing the indications of the last workout and putting it in context with what you have done up to that point. It will also change if you do not train, reflecting for example that you are recovering.

This information is extracted from the estimate of VO2maxBoth in career as in cyclingwhich is something that was already present in previous models.

Garmin Forerunner 935 - VO2Max

Garmin Forerunner 935 - VO2Max

This estimate needs several weeks of data to be reliable, so before you have a reliable data you must have done a few trainings at different intensities.

All this is obtained directly with the optical sensor on the wrist, but for lactate threshold tests (manual or automatic) the sensor on the chest is still necessary. And for the VO2Max in cycling you need to have a power meter on your bike.

I have the impression that the algorithm has changed slightly, showing now slightly more accurate data. Lately my running VO2Max is 3 or 4 points below what I had in other models, but the truth is that the estimated running times (which start from said VO2Max) are now very close to my real times.

Garmin Forerunner 935 - Race Times

Within the same widget you also have access to the state of recoveryThe main news is that now under that sum of hours you will see the recommendation you should take into account about your next training, if you can train normally or it is better to take it easy.

Garmin Forerunner 935 - Recovery

Garmin Forerunner 935 - Recovery Time

After this you will find the training loadThis training load is just a concept that represents the physiological demands you have been putting on yourself, and we each have a level of endurance.

So this figure is entirely personal. A training load of 200 may be optical for me, but for a professional that would be a week of virtual rest. This graph therefore uses your past history to determine whether your training load is correct or not.

For example, if you've been accumulating a weekly COPD of 200 for three months and suddenly you're doing a week with 800, it will obviously tell you that you should watch out. And the opposite is true if your weekly load is a little higher and you've lowered the piston a little in the last few days.

Garmin Forerunner 935 - Training load

Garmin puts all this information into a shaker and mixes it, then provides the data for training statuswhich is the screen that heads the main widget.

Garmin 935 - Training Status

It is divided into two variables: fitness and load. The arrows will indicate how the training you are doing is affecting your fitness and training load. Logically what we are not interested in seeing is that the fitness is going down and the load is going up, because that would mean that we are getting fed up with training without any benefit to our body.

The news doesn't stop there. After finishing a running or cycling training, a new screen will appear, the training effect or Training EffectIt is not a new metric, as it was already available before, but it only gave an indication of 0 to 5 without providing much more detail. Now it is separated into aerobic and anaerobic effect.

Garmin Forerunner 935 - Training effect

The separation of the two metrics now indicates how the workout you have just completed will affect your fitness. The scale remains the same, but will now catalogue aerobic and anaerobic improvement separately, as logically and depending on what you are training for you will be interested in preparing one facet or the other.

Garmin Forerunner 935 - Training effect

In addition to viewing it after training is over or accessing the activity history of the watch, you can also view it among the activity details in Garmin Connect.

Garmin Fenix 5 - Training Effect

If you click on the question mark you will have more details about what each figure means.

Garmin Fenix 5 - Training Effect

As for the values it gives, in general I think they are quite good. The previous training, for example, was a bike ride where I didn't do intervals, but it was a bit demanding at least in a couple of sections, while the rest was smooth. This results in an anaerobic effect of 1.5. A strictly series training will raise this value quite a bit.

And an aerobic improvement of 2.7 that maintains my physical level, as it hasn't been particularly hard.

A different example.

Garmin Fenix 5 - Training Effect

That was a very smooth 15-minute run, recovering from a knee tendinitis, and it marks it perfectly as a recovery without any possibility of anaerobic improvement.

Then a training at the rhythm of the race.

Garmin Fenix 5 - Training Effect

And indeed, I spent all my training in the lactate threshold zone, so it's an improvement in that heart rate range. But even though it's not an easy workout, there's no anaerobic improvement because I didn't do any speed work or push myself above those pulses.

This is where improvement is important, as it now provides information that the average user can use and understand. This is where you need to know how to mix different activities in your workouts so you don't get stuck.

Everything I have indicated so far can be recorded directly with the pulse sensor on the wrist. A chest sensor is not necessary, except for the lactate threshold test specified above.

Garmin Forerunner 935 - Lactate Threshold Test

To obtain this record it is necessary to have pulse variability data, which, by the way, we can also record this other metric in the FIT file of the activity to be able to analyze it later in the applications that support it.

Garmin 935 - HRV registration

But it's not the only test we can run on the clock. So is the cycling FTP.

Garmin Forerunner 935 - FTP Test

In this case and of course, in addition to the chest sensor you will also need a power meter.

In short, everything is exactly the same as the show that premiered in the Fenix 5 and that I already told you in a little more detail.

Navigation on the Garmin Forerunner 935

Yes, there's also navigation on the Garmin 935. The same as we might find on the Fenix 5, which is more geared towards this type of use. This includes things like a route detour warning or an altitude profile. I won't include it here again because I don't think it's a feature that the average FR935 user will get the same performance from as the Fenix 5 user, so I'll leave you the link to all the details I specified in the test of the latter so at least you know what 935 has to offer.

Garmin Forerunner 935 GPS

I haven't noticed any big changes in the behavior of the GPS with respect to the Fenix 5. I mean, it's not the best of all, but it behaves pretty well. Well enough to train without any major problems in any situation.

Without a doubt, the operation of the GPS is what causes the most blisters in this type of device, and in a certain sense it's something that makes me laugh. It's frequent to read comments from users who take their hands off their GPS because it fails. Because it adds or takes away 150m after a 10km race (and no one has asked how it has taken the corners or if it has run between buildings that make the signal difficult). Or because on an athletics track instead of counting the 400m it counts 397m on each lap.

Let's not forget one thing. We have a watch on our wrist which, in the case of the FR935, is 45mm in diameter. When we run, the watch does not face the sky, but is usually slightly ajar. Under these conditions we have to receive the signal from some satellites that are not around the corner. No, they are at an altitude of more than 20,000km. And I repeat, on your wrist you have a very small antenna, in a device that is not precise (nor does it pretend to be), and whose battery we want to last many hours. Really, go over all this the next time you think your watch is failing because the track of your trail run between trees and mountains moves 2m from the road you see on the map.

Nowadays it is very difficult to find a GPS watch that does not work reasonably well. Something that can tell you "you can't train with this". In fact, saving the Apple Watch Series 2I don't remember any model that I can categorize as not bad, but simply regular. All brands have very satisfactory results even in difficult conditions. Logically some are better than others, but there is no model that can be said to be unusable because of poor GPS reception.

So, what do I look for when I perform GPS tests? Well, finding anomalies that repeat over time: constantly irregular traces, cutting corners over and over, etc. Any model of any brand is going to have erratic behavior at some point, it always does and it always will. But again, if you want to know what a bad performance of a GPS watch is, take a look at the Apple Watch test above.

Well, after a little ranting, let's go with the performance of the model in question. As you would expect from a high-end model at this point, in addition to being compatible with GPS satellites it also supports GLONASS.

Garmin Forerunner 935 - GPS and GLONASS

As I said before, there are no big differences with what I saw in the Fenix 5. In spite of changing the steel of the bezel for the plastic material, I don't notice excessive improvements in the reception by using a material that in theory is less restrictive with the signal reception.

I'll start the analysis with this training route that I perform very oftenWith good reception possibilities almost the 90% of the route, but with some key turns, for example in this area.

garmin-Garmin Forerunner 935 - GPS Analysis

At the top of the route the FR935 cuts a little bit of the curve when entering the uphill street. The Spartan Sport Wrist HR and the FR230 do it too, but to a lesser extent. That street is quite covered by trees, so it can present some problems. We can see that that area does not present big problems for the Garmin, but the Suunto gets lost momentarily. In the rest of the turns and straights of the image the operation is quite correct in all cases.

Another complicated area. The street turns towards the sea are in an area with leafy trees that make it difficult to signal. The three clocks behave somewhat regularly, it is difficult to declare a winner as in this situation everyone could have behaved better.

Garmin Forerunner 935 - GPS Analysis

Here you go. another training on June 24thVery similar situations, perfect on the straights and with some overhanging turns. But with some points where it has moved one meter from the real distance. Remember, one meter is within a totally acceptable possible error.

Garmin Forerunner 935 - GPS Analysis

And a different example, of the June 23rdThis includes, for example, going under a bridge where the signal is lost completely, but there is no problem in getting it back.

Garmin Forerunner 935 - GPS Analysis

Pretty boring tracks... because there's not much to highlight.

On the bike everything is much simpler, because at higher speed it is easier to have a clean and nice track. Even going through tunnels, as in this bike training on june 28th.

Garmin Forerunner 935 - GPS Analysis

Even in open water swimming Here you can see them compared to a Garmin FR230 under the swim cap, so you never lose the signal as you are always out of the water.

Garmin Forerunner 935 - GPS Analysis

The distances measured by both are very similar. 935 has gone slightly longer for that instant on the way back where it has deviated a couple of times, but both the exit and entrance to the beach, as well as the swimming between buoys parallel to the shore, records it perfectly.

The Polar M430 didn't have the GPS activated, it was just using it for heart rate recording, so there is no distance data.

Garmin Forerunner 935 - GPS Analysis

All the trainings are linked to the corresponding comparatives. These are just some examples, I invite you to do the analysis yourself by clicking on these links, both of these activities and the ones you will find in the next section about the optical pulse sensor.

In short, positive results on the Garmin 935's GPS. I'm keen to remind you that you won't find perfect records, but I like what I see.

Optical pulse sensor on FR935

As with the Fenix 5, the FR935 also features the new evolution of the Garmin Elevate sensor, which is more discreet and less bulky.

Garmin Forerunner 935 - Optical Wrist Pulse Sensor

Not only is the size new, but its operation has also improved. CF monitoring throughout the day is now constant, as it has a lower consumption and it is possible to leave it active without fearing for the duration of the battery. It now records the pulse every one or two seconds, instead of every few minutes as in the past.

This is regarding the inactive heart rate monitoringWhen training, logically, data is taken every second, both in the new and in the previous ones.

In terms of accuracy, I see good data. The pulse is stable when there is not much activity, and if there are changes in the pulse, it is because there is activity. Garmin 935XT FC GraphicsBut I suppose you're interested in sensor performance during training. Although the wrist pulse sensors are here to stay, they're not yet ready to replace the chest sensors, at least for all activities. There are times when you can do without them altogether and rely on the wrist pulse reading. Let's see what those times are.

As I always like to start my tests with something simple, in this case a steady pace shootingThis is the simplest activity for a wrist pulse sensor, where they can really shine. You can click on the link to see more detail and make your own analysis, if you want.

Garmin Forerunner 935 - Wrist Pulse Sensor

First example compared to a HRM-Tri chest sensor and the sensor of the Vivosmart 3.

Where more problems can occur is with training series Along with cycling training, it is the Achilles heel of optical sensors, where manufacturers must pay more attention.

Polar M430 - Optical Pulse Sensor Comparison

At first glance the result is quite positive for all three sensors (in this case the Polar M430 comes in place of the Vivosmart 3), but let's look at each of the intervals separately.

In the first one you can see that the beginning of both sensors in the wrist is a little slower. There is a small delay until they are in tune with the sensor in the chest, but once they reach the point they remain totally stable until the end of the interval, where again you can see a small delay.

Polar M430 - Optical Pulse Sensor Comparison

Same situation in the second interval.

Polar M430 - Optical Pulse Sensor Comparison

And in the third...

Polar M430 - Optical Pulse Sensor Comparison

And also in the room.

Polar M430 - Optical Pulse Sensor ComparisonIt is not perfect during the whole training, but except for those moments when you can appreciate a little delay - which is not only the case with Garmin, but also with Polar - the result is really good.

Here's another example of series training, this time against the Suunto Spartan Sport Wrist HR sensor with a Garmin HRM-Run sensor as a judge.

Garmin Forerunner 935 - Wrist Pulse Sensor

The Suunto (purple line) doesn't know about the film until well into the first interval. And when the Spartan is incorporated, it's the Garmin that gets lost temporarily at the end of the interval. Why does that happen? Well, it's frequent that we can see some delay at the beginning and at the end of the interval (as you can see in the second and third ones). I'll simply catalogue it as one of those moments that every sensor has when it gets lost. And yes, in the chest sensors from time to time these things can also happen.

As a triathlon watch, it is also important to check the performance of the sensor during cycling activities, which are much more complicated due to several reasons that make reading difficult:

  • Road vibrations that cause the clock to move
  • Position of the wrist on the handlebars (which will depend on the type of bike we are using)
  • Constant muscle tension when operating gear levers or brakes
  • Much more variability in exercise intensity than running

That's why cycling is the toughest test for wrist pulse sensors - not just for Garmin, but for all other manufacturers.

I'll start with a very typical triathlon training, trying to maintain a very constant intensity.

Garmin Forerunner 935 - Wrist Pulse Sensor

The line that interests us is the blue one, which is the one that corresponds to the Garmin 935. The result is acceptable, much better than in the case of the Vivosmart 3 that has two points where it is lost completely. It is interesting to see this test, because it is about two devices that share the same optical sensor.

Why is the 935 much better in this case? It is larger, covering a larger area on the wrist preventing the entry of sunlight. It also has three LED lighting (the bracelet only has two). And probably the algorithm in both cases will vary slightly. This is why I like to perform these tests on all devices, and not take for granted a result from one sensor and assume that it will be the same across the range.

Let's go with other bike training.

Garmin Forerunner 935 - Wrist Pulse Sensor

Same models facing each other, and again the result of the Vivosmart 3 is really bad. Even worse than in the previous training. But let's focus on the red line of the Garmin 935, which is what we are interested in.

The start is good, until about the 7th minute is lost. That strange reading is during a period I was stopped in the gutter, I think I remember answering something on the phone. But as soon as I get back into traffic everything returns to normal. Some occasional moments when it doesn't match 100%, but the result is reasonably good.

In short, I think Garmin has taken a step forward with the new version of their sensor, starting with its lower power consumption, which not only enables a much more constant recording of the resting pulse, but also allows them to offer a very good range even when using the wrist pulse sensor (up to 24 hours with GPS and optical sensor).

On the bike there are better records than we had in the past, just like in interval training in races, but in these two cases I still prefer the data provided by a chest sensor, at least if I am going to analyse these activities later. But in constant pace training without variation in intensity? I have full confidence in the optical sensor. I know there may be times when the reading is not correct, but in return it offers much more comfort.

For example, for triathlon I have it clear, at least for longer distances than the Olympic one. HRM-Tri sensor for the first two segments, but in T2 the chest sensor stays in the box and I go out to run only with the sensor on my wrist. I don't worry about the seconds I can lose by taking the sensor off in the transition, especially because in exchange I will be able to run the half-marathon much more comfortably without having to be aware of possible rubbing or burning.

Because effectively, the moment the watch is disconnected from the sensor in the chest it will switch to the optical sensor and vice versa.

Sensors and Garmin Forerunner 935

If the watch is the central axis of your training, you can be sure that the sensors are the ones that feed information to the main brain, and they are more numerous every day.

Another novelty that was released with the Fenix 5 and, consequently, also arrives to the Forerunner 935, is the possibility to connect with external Bluetooth sensors.

Garmin Forerunner 935 - Bluetooth

This doesn't mean that there is a change in Garmin or a bet on other connectivity, it just opens up more possibilities (something that other brands should take a leaf out of their book and adapt to ANT+ use as well, like Polar or Suunto). Of course ANT+ sensor support is still available, and you can pair all of these:

ANT+ sensors

  • External pulse sensor, including advanced metrics (HRM-Run or HRM-Tri) and memory for water activities (HRM-Tri or HRM-Swim)
  • Footpod for running
  • Muscle oxygenation sensors (Moxy or BSX)
  • Speed, cadence or speed/cadence sensor in cycling
  • Power Meter
  • ANT+ Lights
  • Garmin Varia Radar
  • Garmin Varia Vision external display
  • External temperature sensor Tempe
  • Electronic derailleurs (Shimano Di2, SRAM RED eTAP, Campagnolo EPS)
  • VIRB action chamber

That huge list is only for ANT+ sensors. You have to add the new possibilities opened up by the new support for sensors using Bluetooth Smart technology.

Bluetooth Smart Sensors

  • External pulse sensor (but not using memory options)
  • Footpod for running
  • Speed, cadence or speed/cadence sensor in cycling
  • Power Meter

As for the difference in performance between the two technologies, what you should know is that while an ANT+ sensor will be able to connect to a multitude of devices, Bluetooth sensors can only connect to one at a time. Their relationship is master-slave, so a slave (the sensor) will only be able to connect to a single master (in this case the watch). This means that you cannot use a pulse sensor simultaneously with the watch and a cycling computer or application in your phone.

Of course you can connect several sensors of this type, no problem here. That is, a clock can have multiple slaves, each through a different channel, so you can connect a pulse sensor, a speed/cadence sensor and a power meter.

ANT+ does not have these limitations and allows one sensor to connect to multiple devices, as it maintains an equal-to-equal relationship, so in this case you can connect a pulse sensor to several devices at once.

You don't have to choose between one type of connection or the other, both are concurrently active, so you'll have no problem carrying a Bluetooth pulse sensor next to an ANT+ power meter, for example, the watch will receive information from both.

Connectivity and WiFi

One of the substantial differences with respect to the Fenix 5 is that the two models of the Garmin 935 (both the normal and the one corresponding to the "Tri Bundle") have WiFi connectivity. In the watches of the Fenix range you must pay extra to have wireless connectivity, available only in the models with sapphire crystal.

Garmin FR935 - WiFi

Thanks to WiFi you can synchronize your activities, settings, training programs or any other configuration directly without data cables or a nearby smartphone. However, the wireless network must be synchronized beforehand, it is not possible to search for it from the clock and enter the key manually.

Of course, Bluetooth is also available, so you'll always be syncing with your mobile phone, as long as they're paired through the application (not the phone settings). The Garmin Connect application is available for all platforms: Android, iOS, and Windows Phone.

Thanks to the Bluetooth connection, you can receive on-screen notifications from your mobile phone, not only calls or text messages, but any other: email, WhatsApp messages, Facebook ads, whatever. Everything goes through the Garmin Connect application, where you can select (in Android, those are) which applications will show on-screen notifications. In the case of iPhone, you will have to show all or only the calls.

Garmin Forerunner 935 - Notifications

What you can't do is play music directly from the clock. You can control the playback of your mobile phone, but you'll need to carry it with you if you want to listen to music.

Opinion Garmin Forerunner 935

Garmin has achieved a great product with the 935. It has lost the XT designation, traditional for triathlon watches, but has not lost any of its usefulness for any of the three disciplines. Garmin has simply discarded it because they want to target this model not only to triathletes, but also to advanced runners.

Building the watch from the Fenix 5 is a great success, and in some aspects I consider that the 935 is a better option, not only because it is a little more economical (and offers WiFi in all its versions), but also because of the weight reduction. It is true that it does not offer the same quality feeling because it does not use steel or because of its lightness, but it feels much more comfortable on the wrist and the lower weight should be beneficial for heart rate records, as it moves less on the wrist.

There may be more than one triathlete who is a little disappointed that Garmin has left behind the larger square screen, especially the 920XT and 910XT. They have never been watches with a "nice" aesthetic -although it is already personal taste-, but it is true that they had their own personality, which to some extent the 935 loses.

Garmin FR935

The positive side is that the entire top range is consolidated into a single development, so the new features will arrive sooner and it will be easier to see what's new for both the Fenix 5 and Forerunner 935, as they have so much in common.

The question that may remain is whether you should opt for the Fenix 5 or the FR935. If you are a triathlete the decision is clear, the 935 is the choice to make because of its fast extraction kit and its thinner profile (more comfortable underneath the neoprene). If you are a runner then it is a totally personal decision that you should evaluate yourself and choose between the lightness and comfort of the 935, or the higher quality look of the Fenix 5.

Buy Garmin Forerunner 935

I hope that this complete analysis has helped you to decide if it is a valid device for you or not. All the work I do you can consult it without any cost, but if you want to support the web and with it the work I do, the best way to do it is buy your new device through the links I provide below. And if you don't buy it today, remember to stop by when you do!

Through these links not only will you get a very competitive price and the best customer service, but I will also receive a small percentage without costing you any additional outlay, which is what allows me to continue offering you proofs like this on the page.

Find the best offer

Garmin Forerunner 935


Garmin Forerunner 935 pack

If you have any questions, remember that you have the comments section at the bottom, where I will try to answer all your questions.

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Overall - 9
Training possibilities - 9.5
Platform and applications - 9
Autonomy - 9
Finishes and comfort - 8
Price/performance ratio - 8.5



User Rating: 4.74 ( 4 votes)

Eduardo Mateos

I've been surrounded by electronic devices of all kinds for more than 25 years. Using them, testing them, taking them apart and dissecting them. Long distance triathlete: I swim, run and cycle for a long time. Maybe too much.

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  1. Thank you for the review! The heart rate monitor compared to a forerunner 235 is much better in terms of accuracy ... Is that in the comparisons never face such old models and I would like to know if in that aspect is worth the update

    1. Improvement is noticeable, but it is not an "overnight" difference.

      I usually make comparisons with other models I'm testing, to make the most of the time. In the end I only have two wrists and the training time I have... Anyway if you check the graphs of the 235 compared to its chest sensor counterpart you can see that although there is still some delay, it is now less. In cycling activities the improvement is much more important, but it is still not "perfect".

  2. Eduardo first thanks you for the tests you do are very good. A question about the threshold test from 0 to 10 what score would you give him.

  3. Hi. Thanks for your analysis. Very helpful.
    I have an Edge 820 to ride, I love it. I also do other sports without the bike and I would like a 935 or Phoenix 5, especially because of the new training and fitness metrics. My question is if what I do on the bike with the Edge will also be taken into account by the 935 to calculate its Trainning Status. If there will be a real synchronization between the activities recorded with one device and another, logically with center or core in Connect.
    Because otherwise I don't see the point of so much metrics and fitness control that you're only going to take into account what you're doing with the watch, disregarding the training on the bike which in my case is the most. You can also sell the Edge and do everything with the 935 but I don't want to give up the performance of the 820.
    Another question is whether the Trainning Status takes into account the measurement of daily activity as it does at Polar.

    1. Hi, for what it's worth, I have two Garmin watches that I'm exchanging, what you're asking I don't know exactly, but I can assure you, I wear one in the morning and in the afternoon I put the other one on for training and they synchronize the steps between them without any problem. I understand that for the calculation of other parameters it will be the same, as long as they are synchronized through the Garmin Connect app.

    2. Although the procedure to follow should not vary much from the steps between clocks, Training Status still does not synchronize between devices.

      It's something that surprised me at the Edge 1030 presentation. I honestly expected it. I guess as more devices integrate it, Garmin will. But it should be working by now, since it's one of their star features.

      However, with the Edge 820, you don't know what is possible since it doesn't have that function.

      1. Thank you Eduardo. Regarding the Edge, I was wondering if 935 would take into account the sessions recorded with it (pulse, distance, cadence, etc.) to elaborate the SC. I know the Edge doesn't have it. Neither that nor other metrics.
        I mean, let's say I do five sessions with the 935 and ten with the Edge. Would 935 be worth all 15 sessions for your TS?

        1. No, it doesn't. That synchronization would have to be done with respect to the Training Status, because it's the clock that records it.
          It would be different if the platform created the data from the activities

  4. First of all thank you for the analysis you do, I find them very good and above all complicated to do, with this "convinced me" to buy the Forerunner 935.
    After three weeks of almost daily use I am delighted, there is only one thing that I am not able to configure and if you have a moment I would appreciate your help as I can't find it in the manual and neither investigating for the watch.
    In the race mode, when I perform a training session "designed by me", a display is added with the time that each exercise or recovery lasts, as well as the pace and step distance. Can this display be configured?
    Thanks a lot and sorry, but I can't find it.

  5. Hello Eduardo, a query that is perhaps repetitive to the one in July, but focused on the visualization of the target value during the current interval. There is a possibility to see it on the screen? for example; the maximum and minimum rhythm parameter established for the interval during the performance of the same. Although it is visualized in graphic form with the bar that marks if I am within the area, I would like to have the information to read it on this screen or by changing to another screen, but I have not been able to do so.
    Thank you very much for your detailed work on this article.
    Greetings from Argentina.

    1. No, there is no data field that is related to an ongoing training, so it is not possible to add that type of information on a different screen.

  6. Hello. Another issue that I think is of interest to everyone in the case of training on a bicycle, registered as such, by the 935 but WITHOUT POTENTIOMETER:

    1. Will I obtain "performance condition" values during exercise?
    2. Will you calculate the Trainning Effect and VO2Max?
    3. Will exercise be taken into account in the estimation of "training load", "recovery time" and "trainnign status"?

    Or will the absence of the potentiometer result in none of this being measured? Is the potentiometer indispensable for obtaining all these metrics?

    Thank you again and greetings

    1. Except for the VO2Max, everything else is calculated by heart rate and pulse variability. With one objection, the performance condition is related to the initially marked VO2Max, so in this case I'm not sure if it would be shown or not (I've always had the watch with the power meter synchronized).

  7. Hello, first of all thank you very much for your analyses, they are very good!
    I currently use an edge520 for cycling and a suunto ambit3 peak multisport watch; can the 935 replace the edge520? I mean if it has the same functions in terms of training programming and bike sensor data. I am considering the option of replacing the egde520 and suunto(I have people that 1TP10I would like to sell them) for the 935 for all uses, programming series training in the ambit3 is heavy, what do you think? will I miss something? Regards

    1. The possibilities are the same, except that the Edge 520 is capable of controlling ANT+ FE-C rollers and the 935 is not. Otherwise, you may miss the size of the screen to view the data (and the amount of data on screen), but the features are the same.

  8. Hello, how are you? I'm looking for a watch with GPS, to participate in trail races and for next year to run on the Aconcagua, my limit is 400 euros, what do you recommend? since there are so many brands and models I'm half dizzy
    many thanks

  9. Hello again Eduardo!
    This year you will also do as you did last year... Report back on the featured black friday offers by posting the links where to buy...
    Do you think they'll put 935 on sale? Or is it too new?

    Thank you very much in advance.

  10. Hi, Eduardo!

    You will create a section to inform about the offers that are coming to black friday by putting their purchase links... It is very useful.
    Do you think they'll put 935 on sale? Or is it too new?

    Thank you very much.

  11. Thank you very much for your quick answer and I'm sorry I asked you twice, but my computer gave me problems and I had disappeared.
    I'll keep an eye out for your link to give me something.


  12. wooow, I was waiting for a review like this to convince me, I will definitely buy it as soon as possible, I am new in triathlon and this watch will help me a lot to grow, I just have one more question and I have not yet found in any blog the answer: the only way to charge it is on a computer? what is the battery life time? can it be replaced at any time?

    Thank you very much and greetings from Mexico

    1. You can charge it with any mobile phone charger or similar with USB output. The battery is not replaceable in any way (except by technical service) but don't worry, it will probably last longer than its logical drop in performance over time.

      1. Hi, Eduardo.

        I have had a 935 since September and it has been in technical service longer than my wrist. In fact, they gave me a new unit and it does exactly the same thing as the old one. Everything works fine except the RHR graph, which is a resting pulse graph. If I reset it to factory settings it works for 7 days, and then the graph disappears, leaving only a dot that no longer moves. If I turn it off and on, the dot disappears and it is left with nothing. At Garmin, I think they have exhausted their ideas and I am beginning to think that it is a matter of witchcraft. They had this last unit on trial for a few days and it worked for them. As soon as I put it on, it doesn't draw the graph. Have you heard of anything similar happening to anyone? I have many colleagues from the Triarlón club who don't buy it because they see mine and it stops them. I have searched the forums and I can't find anything. Greetings and thanks for your excellent work!

        1. I've never heard of such a thing. Try creating a new Garmin account, I get the impression that the problem comes from the synchronization with the current one and some problem in the data.

  13. Thank you for the excellent article! One question, how does it go for swimming? I have a Phoenix 3 and it gives many errors when counting the meters run, did you try it in pool or open water? If you know from experience or someone has told you if it works well for swimming, I would appreciate very much if you tell me please! Thank you very much.

    1. I don't have problems in swimming (neither did I with the Fenix 3). The most important thing is that the gestures you make when making the turn are clear.

  14. Hi, Eduardo!
    I see that everyone recommends this new watch, I read your review in detail and I really like it. I have an M430 polar fleece and I was thinking of changing it, is it worth it (my sister would buy it for me, so the possibility of changing it). I mainly do spinning, indoor sports, crossfit and eventually running. The truth is that I find it hard to compare them, I would love to have your opinion about it. Thank you!

    1. In my opinion, for the sports you practice, you will not notice any difference. You will get the same information. The FR935 is a watch more designed to compete, especially triathlon.

      1. Uf that mess, what happens is that if or if I have to change it and I don't know which to choose. Another option is the 735XT, I don't know what differences it has with the FR935, but I want to focus on new models because I care about the optical sensor being as accurate as possible. The vivoactive 3 doesn't have many sport profiles I understand, the truth is that I find it hard to compare. Any suggestions?

        1. The Vivoactive 3 does not have open water swimming and multisport profiles (triathlon, duathlon, etc.) Nor does it have navigation. The pulse sensor is the same in all Garmin.

  15. Hi, Eduardo.

    Congratulations on the analysis

    One question, which would be better to buy the chest strap or the running Dynamics pod?

    Thank you

  16. Hi, Eduardo.

    You're grateful for your time and explanations.
    Last August I bought a Fr 935.
    I've always been loyal to Polar, but I loved Garmin.
    Two months after the purchase he started giving me wrong measurements.
    Constant problems with the altimeter, with variations much higher than the +- 3m variation indicated by the manufacturer. The last altimeter calibrations performed with the GPS in the open sky at the same point, same time, and on consecutive days marked.

    Is this normal?

    Errors in the heart rate sample taken on the wrist, comparing it with another heart rate monitor with its corresponding chest band, variations of more than 30 beats per minute.

    In activities such as walking, for example, a maximum speed of 47.6 km/h is indicated for an activity carried out this morning.

    In indoor activities such as belt training, at a fixed speed, the times per kilometer are different. The accelerometer must fail.

    Since the last reset when uploading the activities to Garmin Connect, those performed in Pontevedra, the name of the city appears in Russian I think.

    After restarting the unit a few times, etc, it seems that I will finally get my heart rate monitor.
    I understand that a product can go wrong, but what I don't understand is that being under warranty makes me dizzy. For my part I am clear that I will not buy another product of this brand again.
    I hope they'll at least give it back to me for repair.
    Thank you for your time.

  17. Hello, I would like to buy the watch, I would use it mainly for mtb and running, you recommend it or it is better one more economical for the activities I will do, greetings.

    1. Unless you're doing a duathlon, you could get almost the same performance for use with a lower-end model, but if you want advanced navigation and performance metrics then this is the clear choice.

  18. Hi, first of all, I wanted to congratulate you on the great job you did.
    I have doubts about buying the 935 or the 735XT, but I can't clearly see the difference between them, beyond the 150 euro price.
    What do you think? Thank you.

    1. Well, roughly speaking, this is what 935 has in store for us:

      Barometric altimeter Wifi performance metrics Increased range Bluetooth sensor support

  19. Hi, I'm about to buy my first garmin, I've read several of your reviews (all very good) and in short I want to buy a fenix 3 HR, but seeing this option, I'm really thinking about it. What do you recommend?
    I practice triathlon, but swimming is always in the pool, except on competition days. By bike, I go out to the mountains on weekends.

    1. Both will give you good results, but if you use neoprene you will appreciate the smaller size of the 935

  20. Hello.
    I have an F-220 and I want to acquire a newer one with a built-in pulse meter.
    I hesitate between FR-235 and FR-935.
    My use will practically always be for running.
    I am struck by data such as the recovery period after a demanding session
    I am aware of the difference in price, but in spite of this and for the use I want to give it, do you think it is justified to acquire the FR-935?
    Could you tell me in a simple way, so that I can understand it, what are the main differences between one and the other? always the ones focused on running

    1. I think the 935 is too much if you're just going to run, but if it fits into your budget there's no objection. When it comes to running there's no big difference, it's in the advanced performance metrics.

      Today you have the FR235 on sale in Germany, it's a very interesting offer... take a look:

      1. Hello. Good afternoon.
        Following your advice, I'll probably opt for the F-235.
        I have a question about leaving my current F-220 to clear my sessions but without them being deleted from Connect.
        I read this on Garmin's website:
        ---Elimination of history
        Select Menu > History > Options.
        Select one option:
        Select Clear All Activities to delete all activities from the history.
        Select Reset Totals to reset all distance and time totals.
        NOTE: This action does not delete any saved activity.
        Confirm your selection. ---

        I UNDERSTAND THAT BY SELECTING "DELETE ALL ACTIVITIES FROM HISTORY" I will delete them from the F-220 but not from the Connect and that they will be stored in the Connect.
        Is this so?

        1. You simply have to reset the clock. Doing so will erase all settings and workouts, but there's nothing to alter in Connect.

  21. Hello good afternoon. I had a doubt to see if someone was happening the same because it leaves me with bad feelings. In open water the clock does not measure the meters immediately ... is as stopped at a distance and stop is when they begin to add the meters with which, I have the feeling that not all meters are measured that I swim and evidently do not leave the socks for every 100m at sea.
    I don't use it in the pool but it has me a little worried because I have the feeling of having worse performance in the sea since I use it.
    Thank you. Greetings.

  22. I return to the thread. Thank you very much Eduardo, thanks to articles like yours I bought the FR 935 and my performance has improved significantly, I am very happy with the watch. I have a doubt that I would appreciate if you could clarify, in the "training status" section, the subsection referring to the "training load" reflects a value that in my case is 872 (after 7 days, optimal). I have been reading on the Garmin website and on the Firstbeat website and I have found that this value reflects the sum of the excess post-exercise oxygen consumption (EPOC) measurements over the last seven days. Is there a possibility to know the value of this excess for each run, that is, I would like to know the different values that after being added together have given the figure of 872.
    Thank you very much for your work.

  23. Greetings man!!

    If you had to recommend a high gamma watch, the best of the best, for duathlon, and that the economic cost is not a limitation, what would it be?

  24. Cordial greetings, thank you very much for the analysis. I want to know if the glass ames of good quality, my girlfriend tells me that it scratches easily and it is better to buy with sapphire glass.
    Thank you very much for your attention.

  25. Great analysis. You could confirm if an h7 or h10 polar band would be compatible with this device. I guess by bluetooth if...
    For me it's a point in your favor.
    Thank you

  26. Two questions, regarding the comparison with polar, I have the impression that the polar graphs are softer, I find it hard to see the same in garmin graphs , and I don't like you have that impression? It's a matter of taking-filtering data...

    On the other hand, with this watch, how to take the option of measuring speed and distance in 3D? it is not clear to me, I understand that initially activated it will be better? is that correct?

    Thank you for your analysis.

    pd. i have it since 3 days ago, i have been a polar user since more than 15 years, with some garmin model, that at the end made me uneasy because of the pulse issue and see their graphs or how badly their bands responded. this one has me absent-minded... i use an h7 of polar, but i don't see the performance in data (graph) that in polar.
    How does that influence the 3D, take elevation data, which I understand is always better.

    1. The analyses of each platform are different in terms of the graph used and how it represents it, but in the end the data is what it is and if you export it all says the same thing.

      In terms of speed and distance, use only the 3D option when you're training in steep areas, otherwise it's worse.

  27. Hi Eduardo, first of all, thanks for your work, it's a pleasure to read all the information you give us.
    I wanted to comment: I come from a Fénix 3 (without hr), sincerely happy with its performance, but a little tired of its volume and weight, my wrist is "small" and I end up fed up with carrying something so big.
    The Instinct's output caught my attention because of its volume and weight, but I don't know if it would be a step backwards, especially because of the IQ issue.
    Considering that its use would be for swimming, hiking and some mountain (I have the Edge 820 for cycling), I don't know if it's worth taking this FR935, or aiming towards the FR945. The previous one is no more than two years old, and in this technological world buying something "old" is not usually a good idea. Is there much difference between the 935 and the 945? Is it worth paying that difference? Has the 935 been left behind?
    Thank you so much for your help.

    1. It would be worth your while if you are going to make enough use of navigation on your mountain excursions. If so, you will appreciate the maps. Otherwise, it is obviously faster in everything, has better breakdown of training metrics, etc. but I don't know if I can afford the extra 200. I have both and I am using them together to prepare the 945 test and obviously the new one is superior in all aspects (and I haven't been able to put any stickers on it yet).

  28. Tremendous Review! very detailed and complete. Saaaalvo that I read it all hoping to find a deep analysis regarding the battery life. Garmin indicates 34 hs with GPS and optical sensor, but it is not so real. At least I did the test, taking out noises, vibrations, and it lasted 21:40 hs. What a comparison of duration using the HRM, or deactivating it, with GLONASS, Galileo, or Ultra Trac, etc.
    Do you have or handle this information?

    Thank you very much already.


    1. I can no longer make comparisons of range, because when the watch stops, it deactivates the optical pulse sensor.

      In the past, the manufacturers' figures have always been fairly accurate, but Garmin indicates up to 24 hours in GPS mode, and then there are other variables such as Bluetooth enabled, etc.

  29. Very good review ... my most sincere congratulations for the work you do!! A few weeks ago I acquired the garmin 935, and the HRM band (The simple), my problem comes from working with two Stryd apps to perform training and analysis of power training, the reading of the pulses of see altered. However when I perform another activity without these apps works perfectly.
    I've already unlinked everything, paired it up again and you're three days working properly but in the end it goes back to its origin hehehe...

    I'm desperate for the truth, thank you

    1. Thank you, Daniel.

      What you're talking about has nothing to do with the other. I usually use both Stryd and heart rate chest sensors without any problems, but keep in mind that in winter it's more complicated for the chest pulse sensors because of the drier environment and lack of sweat from the cold.

  30. And what can be the case Eduardo?? I am in contact with Stryd, to see where the problem can come from, they tell me that the apps can't be, and instead of garmin they tell me that if the band with another kind of sport in which I don't spend stryd works well, the problem is the apps.

    What do you recommend me to do, the truth is that besides I like to have all the exact data, my trainer also needs it, and this situation has me a little desperate.

    Which apps do you use to read stryd data on the clock?

  31. Hi Eduardo, I'm in a mess of reviews!!! I've read the 945 one, but finally I discarded it because it's out of my budget. Then I thought about the 245, for running and some trails, great. But.... What if I invest a little more? The 935 is now well priced and maybe I'm more interested than the 245... The 935 has maps? I've been interested in poder to see the altitude profile, but I don't know if I can see it on the 245.
    Sorry for the beating, but I'm super lost.
    Thank you very much.

    1. No, the 935 does not have maps. Except for the triathlon capabilities and the barometric altimeter, there is not much difference between the 935 and the 245. If you want maps it has to be 945 or Fenix 5 Plus and up. Altitude profile, if I remember correctly, is not on the 245.

  32. Good morning Eduardo, first of all thank you for all the work you do as it is of great help to everyone.
    My question is the following, I'm desperate because I can't get poder to display strava segments in the activities, I'm Premium in strava, I have it synchronized, segments added to favorites... I think everything and nothing.
    Could it be something in my watch settings that I have touched?

    Thank you and is that in the absence of races ... JJa

    1. Good Eduardo, after having downloaded segments... Activated in Garmin the strava application to warn of segments... Yesterday during the training nothing at all... I do not know what can be, I'm about to reset the factory clock and redo the whole process.

  33. Hi, I've read both your reviews, the 935 and 945 and I don't know which one to get. I do open water swimming (and some trail and swimrun) and I have a 735 that lately is giving me a lot of errors with the gps. I don't know if it's just that it's old or what, but it's making me cranky that it's failing so much. Now, do you think it's really worth it for me to move to a 935 or 945? And if so, which one, taking into account that what I am looking for is reliability of the gps?

    Thanks for all these articles you do!

    1. If open water swimming is what you'll be doing most of the time, the 935 will do the job. If trail use is frequent, then you can use the 945 maps quite frequently.

  34. Hello.
    One question, does the watch measure the caloric consumption during the activity only, or does it show the calories consumed during the whole day whether or not you exercise that day?

      1. Thank you very much for your response.
        Finally, I would like to know if the Polar Vantage V also has the same caloric consumption for the whole day.
        Thank you very much in advance!

  35. Hello!

    Is it still worth it to buy the FR 935 in 2020? Due to my budget I am considering the FR 935 or the Coros Apex. Even though Coros has a better battery, but as far as I know - Garmin has a far better software, custom apps and so on.

    1. Yes, it's still a pretty solid watch. It doesn't offer the bells and whistles from higher end models (music, maps, payments), but it's still a great option.

      But those watches are maybe intended for different markets... I would go with the 935 if you are doing triathlons, and the COROS APEX if you are more into trail running.

      Don't forget that the COROS has many great things, like running power, running track mode and so on... it's a great watch as well.

  36. Hi, Eduardo,

    Faced with the choice of a 245, 935 and 735 at the same price which would you stay? I would use it only for running, I do not know if the navigation menus on the screen and data vary much and do not know which may be more worthwhile at equal prices.

    Thank you very much.

  37. Hi, Eduardo,

    I usually go running and swim both in the pool and open water. I would like to start tracking and scheduling my workouts and have been reading your posts on the Garmin Swim 2 and the Forerunner 935.

    Is it worth going for the Forerunner if the difference is 40 €?

    Thank you very much!

  38. Hello Eduardo, good afternoon.

    Is it worth buying the 935 today, year 2022, given that it has dropped quite a bit in price and is still valid for the vast majority of mortals - considering that the 945 is still quite expensive, what is your opinion?

    Another question, can the data fields be configured from the Garmin app with the latest updates?

    Thank you very much.

  39. Hola, muchas gracias por tu descripción y análisis, muy bueno.
    Estoy dudando entre el 935 y el 255 (el básico). Sinceramente no se por cual inclinarme. Yo lo uso principalmente para nadar (piscina cerrada y aguas abiertas), para correr y cada tanto para la bicicleta.
    Ahora se me acaba de romper el 735xt y me gustaría elegir entre uno de esos dos que acabo de nombrar.
    Any suggestions?
    Thank you very much.

  40. Hola buena tarde,

    Tengo duda de cuando Garmin descataloga un reloj, que confianza hay de que su funcionamiento siga optimo por varios años,, Ya que veo que descatalogaron el 935 y veo que hay muchas ofertas de ese reloj,, o es recomendable comprar un modelo mas reciente,

    cual seria la recomendación solo para un Runner

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