COROS PACE 2 | In-depth review of the new best-seller from COROS


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Finally, five months after its official presentation, I can publish a review of the COROS PACE 2. COROS introduced it, sold a few, and since then it's been missing. The units that were leaving the factory were sold exclusively through their website, and still the website showed deliveries in up to 5 or 6 weeks.

COVID issues aside, the general demand from the public has been (and remains) very high. The reason? It has a great price given the amount of features it has to offer.

It is not just a running watch, it supports a lot of sports profiles. Logically running is one of them; but also rowing, paddle surf or multisport as triathlon. And although it does not have any exclusive feature it did premiere some of the new ones that COROS presented for its entire range and that is not common to see in watches at this price point. And among them what stands out is the estimation of running power without any external accessories.

But I won't spoil any more details, you can read everything about the COROS PACE 2 in the review below. Shall we begin?



Overall operation - 8.5
Training possibilities - 9
Platform and applications - 7.5
Battery life - 9.5
Finishes and comfort - 7
Price/performance ratio - 10



One of the best options within the mid-range. Lightweight, with a multitude of features including running power, training plans from various platforms and even a triathlon sport profile. You can't for much more from a watch that cost less than 200€.

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The good

  • Features far higher than what the price suggests
  • Comfortable and lightweight
  • It allows to download workouts from Training Peaks
  • Running power 
  • Extremely lightweight

The bad

  • I haven't got good HR readings with the nylon strap
  • Very basic construction and cheap feeling
  • Unreliable training load

COROS PACE 2 specifications

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If you like, let's go first with a complete list of features so you can take a complete look at everything it offers, and then go into all the details that I want to highlight about this new model.

  • 42mm diameter. Quite smaller than the original COROS PACE which had 47mm.
  • 1.2″ and 240×240 pixel display, which means reduced frames. The lens comes with Gorilla Glass.
  • Only 29 grams of weight with nylon strap.
  • 30 hours of battery life, with the ability to reach up to 60 hours with UltraMax mode (reducing GPS accuracy).
  • Up to 20 days using optical heart rate sensor.
  • Faster processor than the original model (COROS says 1.5X) and with more memory space (from 16MB to 64MB).
  • Compatible with GPS, GLONASS and BEIDOU. Later it could be compatible with Galileo via software update.
  • Adopts the digital dial control system, like all other models in the range.
  • Barometric altimeter.
  • Magnetic compass.
  • Thermometer.
  • ANT+ and Bluetooth sensor compatibility.
  • Redesigned charging cable, no longer using a clamp but with COROS proprietary connector.
  • Running power estimation without the need for external sensors
  • Native Stryd integration with all its specific metrics
  • Compatible with COROS or Training Peaks training plans
  • New Night Mode

This is not a high-end model, so it does not have “important features” to show off. Although it is true that with the introduction of the PACE 2, some of the features it includes also reached more models in the range through a firmware update such as running power estimation, Stryd compatibility or training plans.


Compared to other COROS devices, in the PACE 2 we won't find specific outdoor profiles for trail running and the likes, route navigation and the quality of the materials used is inferior. But it offers the same features in every other way.

But let's not get ahead of ourself and let's begin with the review because that's what you came for.

COROS PACE 2 basics

Before going going into specifics about everything that the COROS PACE 2 has to offer in sports, it's time to talk a little bit about the watch itself.

Unlike the original PACE, COROS have opted for a side crown on the PACE 2. In addition to allowing us to scroll through the different screens, that crown also acts as the main button to select different options, or to start or pause a workout. 

Below it we find a second button, whose only purpose is for laps or go back to exit a menu.

COROS PACE 2 - Buttons

The screen is not touch enabled, which is to be appreciated on a watch intended for sports. Now that we are talking buttons, the only thing I would ask for is a specific button for light, although it is more customary than necessity because the watch responds quite well to the wrist turn, or simply to the press of any other button.

That crown has already become a symbol of identity for COROS, so the user interface is pretty well designed to use with it. Is it convenient to use? In the end it depends on how you get used to its use. At first it costs a little to catch the dynamics, but after a few days it does not represent a major problem. Neither better nor worse than classic buttons.

To enter the main menu we can press the crown and access all sport profiles.

COROS PACE 2 - Sport Profiles

Additionally we have a quick access menu that can be reached by holding down the bottom button.

COROS PACE 2 - Quick menu

Both menus are customizable and from the phone app we can select what to see and in what order.

The COROS PACE 2 is available in two colours (black or white), but we also have the possibility to choose the material of the strap. We have the classic silicone strap or we can opt for a new nylon strap that is much lighter.

COROS PACE 2 - Nylon Strap

The materials that COROS has chosen for the PACE 2 are basic, so the watch has a cheap feeling on it. Which is not criticable, because it is certainly a cheap watch. But it is equally true that a Garmin FR245, which is also entirely made of plastic, offers a better look.

Back to the watch and its menu, if we turn the crown from the main screen we can access the different widget screens that are present on the watch: our workout schedule, metrics of the day, HR, altitude, barometer, temperature, sunset and sunrise information and notifications.

In the case of graphical widgets, pressing and rotating the crown allows us to see data from past hours.

COROS PACE 2 - Widget

Of course, and as with all other brands, all that data goes into the app. As soon as we open it we find the main panel with all the details and graphs.

To expand details of each of these graphs we can click on them and it will expand to full screen, where you can swipe your finger to check specific data. This one you see below, for example, is the sleep graph.

COROS PACE 2 - Daily Sleep Graph

In general, sleep and wake times are somewhat correct, although I can't ensure about the different phases of sleep as I have no way to verify that it is correct.

It's the same with the rest of the data. Here you can see the heart rate. In which by the way, although the watch keeps the sensor on 24/7 there is not too much definition on the HR graph, simply showing 30-minute blocks with minimum and maximum during that time. Although I guess if there's no heart condition, we don't need much more either.

COROS PACE 2 - Daily HR Graph

If you look at the left column, we're looking at the graph for the day. If we click on any of the other options we can see week, month or year. Here is the weekly chart for the sleep period.

COROS PACE 2 - Weekly Sleep Graph

Back to the watch, we can choose the dial of the time from among many of the ones that COROS offers us. In the watch we can have up to five dials stored, and you can choose from dozens of them in the app.

And it is in the quick menu where we can access those dials we chose from the entire catalog.

COROS PACE 2 - Clock faces

Since we are talking about the quick menu, I want to highlight a few functions that we can find in it. You can access this menu both from the home screen or when doing a workout.

  • Night mode

It is a new mode present in COROS watches. When you turn it on, the display illumination will be permanently on (with the brightness set to the minimum). It will be disabled when you finish the next workout or at the next sunrise.

  • Metronome

It allows you to activate a metronome for your running technique workouts. For example, if you want to do exercises of 180 steps per minute, selecting it in this option the watch will beep and vibrate 180 times per minute.

  • Broadcast heart rate

The COROS PACE 2 will broadcast the heart rate of the optical sensor and can be received on nearby devices via ANT+.

  • Battery

This is a fun option, COROS is the only manufacturer that offers something like this. Just like mobile phones you can see which resources have used the most energy since the last charge.

  • UltraMax

By enabling this mode you can reach up to 60 hours of battery life. It works like this: Every 2 minutes, the GPS is enabled for 30 seconds. The remaining 90 seconds the watch will make measurements thanks to the compass and internal accelerometers of the watch.

It's great to have this option available although thanks to the huge battery life you will rarely need to use it.

  • Satellites

¿Quieres ver la constelación de satélites que te rodea? Entra dentro de esta opción y podrás ver todos los satélites que tienes encima.

COROS PACE 2 - Satellites

Well, enough about the basics. Shall we go straight into sports?

COROS PACE 2 for running and sports

Obviously beyond all the details of activity tracking or day-to-day notifications, what interests us most is the use while doing sports: as a watch for running, cycling, swimming, going to the gym or whatever you want to practice.

COROS has made some cuts in terms of the profiles we can have in PACE 2, which does not mean that it is a watch short of possibilities. These are all the profiles it offers.

  • Run (outside and on treadmill)
  • COROS Track run mode
  • Cycling (outdoor and indoor)
  • Swimming in a pool
  • Open water swimming
  • Rowing (outdoor and indoor)
  • Calm water rowing (paddle surf)
  • Cardio (indoor or outdoor)
  • Strenght
  • Triathlon (or multisport, we can choose up to three sport profiles to go one after the other)

Among these profiles there are some that premiered with the COROS PACE 2 and that have also reached the rest of the range; but others added to the rest of the range are not present in the PACE 2, and there are other profile omissions that were already on other watches and have not made their appearance in the new model.

Those that were already on other watches and do not appear in the PACE 2 are mainly those related to mountain (trail, mountaineering, hiking, snow sports), because the focus that COROS wants to give to this watch is road running. We also do not have a secondary profile of multisport different from triathlon (which I do not consider too important).

And from those who have reached other top models and are not in the PACE 2 we have speedwinsurf, windsurfing, rowing in whitewater. 

In this image you can see the configuration options for PACE 2 (left) or APEX Pro (right).

It doesn't mean, for example, you can't trail running. Of course you can (and I've done it assiduously), what you can't have is a specific profile configured differently than road running. 

Not that it is something too important, however the most important omission is that in PACE 2 we do not have navigation, which can be an impediment to its use in the great outdoors.

In any case, the COROS PACE 2 offers more than enough features for a watch at its price. Not only that, I can say that it has features that exceed its price range like support for for all kinds of ANT+ and Bluetooth sensors, including cycling powermeters or full support for all Stryd metrics (something exclusive to COROS watches).

What are we not going to find in the PACE 2 (nor in the rest of the watches in the range) that we have in high-end models from other brands? Things like Garmin ClimbPro (shows the different uploads we are going to find), Polar's Hill Splitter (separating the different uploads automatically for later analysis) or the different functions of SuuntoPlus. 

But that is not so bad, these are interesting features, but it does not represent any kind of impediment to the traditional use of a GPS watch.

Back to the different profiles, each of them allows to be configured independently. All settings are made from the phone, while on the watch we have access to small settings.

This is so for better or worse. Setting up screens in the phone app is a much more comfortable, faster and enjoyable experience. But if you want to make a change in the middle of a workout to add a specific field, you won't be able to do it without carrying the phone with you.

Each sport profile allows us to configure up to 6 data screens, being able to display in each of them two, three, four or six data.

On the watch you can simply set different alerts (pace, distance, cadence, HR) or auto pause.

During the workout we will have access to the screens we have created, being able to alternate between them simply by turning the crown.

COROS PACE 2 - Data screen

With the bottom button you can mark laps individually, or entrust everything to the auto laps if you chose it in the menu.

Once the workout is finished, you can see the summary of all the details on the watch screen itself. The information is quite standard but it is true that everything is shown in a more visual way, especially compared to Garmin.

After you sync your watch with your phone, you can also see all the workout details in the app (and if you've set it up, it will be sent to third-party apps like Strava).

It's also quite standard. Of course, we must emphasize that COROS does not have, at least for the moment, a web version where you can review the workouts, so everything is limited to what you can see in the phone app.

All this I have explained is for running, but it would be exactly the same for any other sport you had selected (whether cycling, swimming in the pool, open water, etc.). 

Do not forget that we also have the run mode on athletics track. I'll explain it briefly and if you want to read more details and see the different tracks I encourage you to take a look at the COROS APEX Pro review, which is where I tried it with great detail.

It's the way you should use when you're going to run to a track. The watch identifies the street you are running on (which you have had to indicate before), making the layout and measurement exclusively on that street.

In this mode the watch uses GPS data and through an algorithm it will place us correctly on the 400m track providing not only a beautiful track, but also accurate pace and distance data. Here you can see an image of the APEX Pro review (right now getting into a running track is almost as difficult as going to a pool...).

APEX CHORUS Pro - Track Mode

Finally, before we talk about the two functions we had not seen before in COROS (and to which I have reserved their specific sections), it is worth a little comment about sensors.

All watches from the brand have supported all kinds of sensors. There are no limitations, nor technology used for transmission (we can use Bluetooth Smart and ANT+ sensors without problems) or of the type. That includes power meters, something that is not common in watches in this price range.

Many little things as you can see... Let me talk in more detail about the workout plans first and later on about running power.

Training plans and interval workouts

Another feature that have arrived with the COROS PACE 2 (and of course the rest of the range except the original PACE) are the training plans. This includes creating a complete training plan or simply some one-off session of an interval training.

You can create a full training plan from the phone app, receive it from a third party (for example a coach) or more recently, by downloading the plan you have on Training Peaks (which will be the used option by most).

By this I don't mean that when we finish a workout it is automatically sent to other platforms, call it Training Peaks or Strava (this was already done before), but if we have our training plan created in Training Peaks, it will be automatically downloaded to the watch every day enabling the watch to guide us through the different phases of it, whether it's an interval workout or a simple long run.

In fact, it will ask you if you want to start the scheduled session when you want to start your workout.

COROS PACE 2 - Scheduled training

Within the menu there is also an option for the training plan, whether it is the one from COROS or Training Peaks, where you can see the workouts for each day.

COROS PACE 2 - Training Calendar

As for the Training Peaks workout download it works exactly like a Garmin watch. The overall experience is satisfactory, although when it comes to training I find things that should be polished. For example it is not able to correctly identify the number of remaining intervals and always shows 1/1 for the current interval. Garmin does interpret it correctly.

COROS PACE 2 - Series training
In the image above both watches are in the same interval (rest section of the second of six). Garmin does correctly indicate what is left of workout ahead, but with the COROS we have no idea how many we have left.

However, if the training plan is done with the COROS app none of this happens, therefore it is simply an issue of interpretation of the downloaded data.

Another thing that I find somewhat annoying is that when the scheduled workout comes to an end, the watch stops the activity automatically. The theory says that's how it should be done, but... what if I want to continue running for the five minutes I have left until I get home? What if I decide to extend the long run two more kilometers?

The watch will force us to start a new activity and have it separately (or use third-party tools to join the file), when it would be more reasonable that the watch asked us if we want to stop or continue.

It also does not allow you to do an interval workout on a treadmill (only on specific GPS profiles such as running or cycling, and after the latest update also on track). Well, these are small objections to a function that has just disembarked on COROS, it doesn't mean they still can't improve it or fix these little things.

Back to the COROS training plans, if you do not work with a coach you can always turn to the COROS workout library. You have different plans from beginner to a sub 3:15 marathon.

In any case, adding one of the COROS training plans simply requires that we open one of them from your phone and select Open in the app.

By adding it, you simply need to select a start date from the plan, and from that moment you will have the calendar on your watch.

This works exactly the same either for the COROS calendar or the Training Peaks calendar. On the watch you can open the Training Plan option.

COROS PACE 2 - Training plan

And you will see the calendar, where the different days will be marked each with their corresponding workout.

COROS PACE 2 - Calendar

You can select any of those days with the crown, you will be able to see what exercises you need to perform and choose it to start that activity.

COROS PACE 2 - Conduct training

From there it's just a matter of start suffering.

However on the watch we can also configure basic intervals, selecting the number of intervals and setting time or distance for each of them. What we can't do is set a goal for pace, heart rate or power.

COROS PACE 2 - Intervals

Regardless of the things that still have to be polished, this is a feature that many of you will appreciate a lot, especially if you are regular to training plans or use Training Peaks. The implementation is mostly successful and everything is easy and intuitive to perform. It even allows you to be able to create a training plan and then share it with a third person.

Running power

The estimation of running power is another big reason why the COROS PACE 2 is a very interesting model. But before we continue, I would like to stress that at all times I am talking about estimating power. It is not a direct measure, data is being estimated from other metrics.

Not all running power meters offer the same data as there is no universal algorithm used by all companies. Each one performs the development independently and weights the values as you think best fit. Right now, beyond the number itself we should care more about the consistency that a device has in different workouts.

This is not the first time that COROS enters the world of running power. It already tinkered with it through the COROS pod, but in the review I did of the COROS APEX Pro the results I obtained were not good, as there were multiple inconsistencies in the information shown.

But now that has changed. It is no longer necessary to use an external sensor for power calculation, the watch is able to estimate it directly with its own sensors (accelerometer, barometric altimeter, GPS...). They have also changed the algorithm used and it no longer has anything to do with what I found when I tested the COROS APEX Pro.

It wasn't the only thing COROS has done about power. They also added native support for Stryd offering all their metrics. From leg stiffness to vertical power, through air resistance. And of course all advanced running dynamic metrics such as ground contact time or vertical oscillation 

They have looked so much at Stryd when it comes to developing the new possibilities to be able to run with power, that even the algorithm is very similar. I've actually come to think that COROS and Stryd use the same (something that have been denied by Stryd).

Examples? Ask and you will be granted. Here are a few examples, starting with this interval workout.COROS PACE 2 - Power comparison

As you can see the warm up is very similar, offering very similar power numbers. In the intervals part there are some more variations, but again it is in the same power ranges. 

I reiterate that there is no direct measurement, so we cannot expect total similarity. In fact, we wouldn't even get the same data if using a Stryd on each foot.

Here's another interval workout on a totally different day.
COROS PACE 2 - Power comparison

Same results, the estimation made by COROS and Stryd is very similar, although in this case the COROS has shown somewhat higher powers in the intervals.

Trail running? Well, I've got some of that, too.

COROS PACE 2 - Power comparison

I've made the comparison exclusively against Stryd, ignoring data from other devices (such as Polar or Garmin). It doesn't mean that Stryd is the most accurate, but they are the ones who have done the most about running with power. And the fact that COROS and Stryd match their numbers is something to stand out.

All the workouts that I've done have led me to the same conclusion: there are no obvious differences between the power measured by Stryd of the power measured by COROS. Not even on slightly higher windy days (something that the last Stryd can measure), although it is true that I have not had extreme windy days either.

In the end it has led me to think one thing... It is true that in the case of Stryd there are more metrics, it gives access to the PowerCenter (Stryd's platform) with additional information. But in the end what interests the vast majority is training with power, because the average Joe does not understand what you can achieve with other metrics such as leg stiffness or vertical power.

Stryd costs 229€. The COROS PACE 2 costs 199€. And unless you really want to make use of Stryd's platform, both will offer you the same thing and the COROS costs 30€ less. And let's not forget that it's also a GPS watch that serves a lot of other things.

If despite all that you still want to use Stryd for the additional features it offers, you don't have to worry either. COROS natively supports everything Stryd has to offer.

GPS Performance

Like the optical sensor tests you'll see in the next section, GPS comparisons are done in the same way: with the watches accompanying me in my usual workouts. Wearing both the COROS PACE 2 and other watches and checking where the problems appear.

I don't have a defined path to establish a score for the simple reason that there are other external factors that we should never forget. Things like clouds, leaves on the trees or simply the position of the satellite can alter the GPS results from one day to the next. 

So once the methodology is clarified, let's look at some examples of workouts to check the performance of the PACE 2. I will start with this route in which I was also accompanied by the Garmin Forerunner 945 and the COROS APEX Pro .

One of the things I wanted to try was the different GPS settings. While GPS+GLONASS was selected in PACE 2, APEX Pro was set to GPS+Beidou. It wasn't a good day because it was raining, which always makes it difficult to receive a signal.

COROS PACE 2 - GPS Comparison

Reviewing the track it has certainly been a complicated day when all devices have had light and shadows... The first thing I want to highlight is that the PACE 2 was on the left wrist, the APEX Pro on the right wrist and the Garmin on my left hand. I make this clarification because it will be common to see the APEX Pro route always separate from the other two, and that's because there were really that separation.

In this image below I marked the actual route. Both PACE 2 and APEX Pro play a good role, while Garmin is somewhat lost both before and after performing the turn.

COROS PACE 2 - GPS Comparison

This turn occurs after passing under a row of fairly leafy trees, which joins the already complicated situation. I'll do the same thing again and I mark the real route. 

Here the APEX Pro cuts the turn quite a bit and the FR945 goes long again, with PACE 2 being the best performer on this part.

COROS PACE 2 - GPS Comparison

Later the situation is quite similar in this closed turn, being the COROS PACE 2 the best without being an excellent performance either.

COROS PACE 2 - GPS Comparison

On the way back and running down a street with buildings not too high (4-6 floors, wide avenue), the APEX Pro is totally lost while the other two keep up.

COROS PACE 2 - GPS Comparison

Not that this is a workout that gives many keys about general operation, but it does let me see that I prefer the GPS + GLONASS configuration for COROS as the output was better.

Totally different workout, a long run to the village of Benahavís. A magnificent cloudless day with the sun shining, perfect conditions for signal reception. For this occasion I replaced the COROS APEX Pro with the Polar Vantage V2.

COROS PACE 2 - GPS Comparison

This is how most of the track has been, with all three devices perfectly aligned

COROS PACE 2 - GPS Comparison

Which doesn't mean everything was perfect. In this area, a little harder when running down a hillside, there are some complications. Where the arrow is marked with a 1, it is the Garmin FR945 that does not make the path correctly. Both the COROS and the Polar trace the track perfectly (in fact the trail is seen in the satellite image).

On the other hand, in the arrow with number 2, the COROS has deviated from the correct route about 3 or 4 meters. At that point there are not too many signal reception difficulties, so that shouldn't have happened.

COROS PACE 2 - GPS Comparison

On the downhill route I had to cross a couple of tunnels in which the watches lose GPS signal irretrievably. Good opportunity to check its operation when something like that happens...

I marked in orange the point where I cross under the highway. At the exit both the Vantage V2 and the FR945 are slightly dizzy, while the PACE 2 remains undisturbed. Of course, while crossing under the road none of the three has made strange movements.

COROS PACE 2 - GPS Comparison

This is the second tunnel, very similar to the previous one. Here the behavior has been quite good by the three of them, because they have recovered the signal very quickly (I make a left turn right out of the tunnel). The Polar has shifted a little to the right, but there is no major error.

COROS PACE 2 - GPS Comparison

Let's see a trail run now.

COROS PACE 2 - GPS Comparison

Again a sunny day (I'm in Marbella...), but somewhat slower paces being in constant unevenness. That makes it difficult for the tracks to be “pretty” because there are not much separation between the recorded points.

Despite that there are no issues in the track recorded at any point, nor in the exit...

COROS PACE 2 - GPS Comparison

Nor halfway when I run down the mountain.

COROS PACE 2 - GPS Comparison

Finally here's a bike ride. In this case mountain biking.

COROS PACE 2 - GPS Comparison

Same as before in the trail run, zero incidences along the route, not even in the most complicated areas.

COROS PACE 2 - GPS Comparison

In short, except for the first example where the reception was truly complicated and that affected all the watches, in the rest of the workouts there has been no major issues to review. 

That doesn't mean everything was absolutely perfect. No, a GPS is not a precision instrument and will never offer us 100% perfect operation, but the performance has been very good as long as there was no rain or heavy clouds in the sky.

Optical heart rate sensor

Now it's time to talk about the optical heart rate sensor. The PACE 2 has a sensor with a fairly basic design, simply the optical sensor itself accompanied by two green LEDs. Therefore it is far from much more complex designs that we can see now with greater number of LEDs or using different colors.

COROS PACE 2 - Sensor

But that doesn't mean it's bad, that's what the tests we'll see next is for. But before I show you comparisons of different sensors, I'd like to remember some basics of optical sensors.

Keep in mind that a wrist heart rate monitor does not work the same way on all bodies. We're all different, and if we put things in the equation like skin tone, tattoos, body hair... the difference from person to person can be quite big.

In my tests it is not that the spectrum of users is very broad: it is me, myself and I. So what works well for me might not do it for someone else, or it might be better.

But the most important thing to keep in mind is that you have to follow some guidelines to wear the sensor. It should be tight (but not cut off your circulation), enough to keep the watch from moving freely on your wrist, leaving a separation of approximately one finger from the wrist bone. By following these details you will ensure that you get the best results that your conditions can offer.

It is also important that you understand that while a heart rate sensor on the chest performs effective measurement, the optical sensor estimates our pulsations. In this post I explain all this more broadly.

In the weeks I've been reviewing the COROS PACE 2 I've done it with two straps. First of all with the original nylon strap with which I received the watch.

COROS PACE 2 - Nylon Strap

But apparently I didn't adapt too well to the strap and how it fastens, because I did not get good performance from the sensor. Even in spite of wearing the watch well positioned and tightly (and also considering that with this strap the weight is almost insignificant), in the tests I saw strange things. 

Here is a clear example of that erratic behavior. A heart rate peak in the 16th minute that could be considered normal if I didn't wear any other sensor.COROS PACE 2 - Optical pulse sensor comparison

That was an easy soft-paced workout ending with 20″ sprints. A type of workout that any heart rate sensor must record correctly. 

Here is another example, although this time doing an interval workout. Again with the nylon strap. There is a small spike at the beginning that does not take long to recover, but I marked you the part I'm going to zoom in (the intervals).

COROS PACE 2 - Optical pulse sensor comparison

There are two intervals that are performed correctly, but from the third on it all starts to go to the dumpster. 

COROS PACE 2 - Optical pulse sensor comparison

The only explanation I can think of is that when the strap begins to get wet by the sweat, the watch will tend to move on the wrist causing these erroneous readings.

I know that other reviewers have not had issues with the sensor, so thinking about the strap and before I would consider that I had a watch with a faulty sensor, I changed the watch band with a silicone one.

COROS PACE 2 - Silicone strap

With the new strap practically all my problems disappeared. Here is an example of a 4×2000 workout.

At first I have circled a problem with all the sensors. The Polar H10 was constantly moving and I had to stop to adjust the strap. Once done, problems with the chest sensor are over, at least up to the two small spikes that can be seen at the end.


COROS PACE 2 - Optical pulse sensor comparison

As for the COROS PACE 2, the start was somewhat irregular until I started to warm up, when it regained the composure and then everything went perfect until the end. It simply shows a slight delay at the end of the intervals, which is common in all optical heart rate sensors.

Another example with the silicone strap? Here you go, this time from a trail run.

COROS PACE 2 - Optical pulse sensor comparison

And here, except for a small scrap on the part of the Garmin FR945 around the minute 10 mark, there is total synchrony in all three graphs even despite being a workout with a lot of intensity variation.

Finally we have cycling with the expected result. Bad, as in the vast majority of optical heart rate sensors.

COROS PACE 2 - Optical pulse sensor comparison

The summary is that I have seen two very different behaviors depending on the type of strap used. With the nylon strap I did not have a good result in workouts, with fairly frequent errors. 

But it is not a sensor issue, because when I used the watch with a traditional silicone strap with clasp, most of the errors were not present.

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COROS PACE 2 opinion

I've been using the COROS PACE 2 for a little more than a month, both in workouts and during the day to day. In all that time I have almost never missed the Garmin Forerunner 945, which is “my watch” when I'm not testing any other. I think it's quite descriptive as a summary of my opinion about the COROS PACE 2.

COROS has been fully successful with this model and what it offers. It is a cheap watch with a cheap feeling, but despite that it offers all the features we may need during our workouts. 

It doesn't mean it's perfect, there are things to polish like Training Peaks workouts, some translations or metrics that don't make too much sense (training load is useless). But as a whole, the PACE 2 is more than satisfactory. 

In addition, with this model COROS brings the general public the possibility of running with power, something that until now was relegated to users who were willing to spend more than €200 on an external sensor, or who bought high-end watches (Polar or Garmin that support the Connect IQ application). 

This is the path that COROS must take, to offer a watch that for its price is positioned below its most direct rivals with similar features (or even higher, such as running power). Make themselves known to the general public with an accessible model and good performance. That will be the customer who will then scale to more expensive models within the range of COROS; models that offer better finishes and/or more performance.

For 199€ there are not many watches on the market that offer a better commitment. Within the category we can find three models from other manufacturers: Garmin Forerunner 245, Polar Vantage M and Suunto 5.

The FR245 is more expensive, has no barometric altimeter or running power. Although in its favor it has route navigation and offers a version with music playback.

Practically the same can be said about the Polar Vantage M; without power, altimeter or Training Peaks workout download (although it does have its own platform), although it has good training load metrics for training, sleep and rest.

For its part, the Suunto 5 has a smaller screen with somewhat worse visibility. In its favor it has a higher quality materials, but again it lacks altimeter and does not even have the possibility to create slightly complex interval workouts.

What is clear is that the COROS PACE 2, within the mid-range is a full-fledged leader who has virtually nothing to envy to any model of another brand. A watch that should undoubtedly appear in the purchase recommendations guide.

I really think the COROS PACE 2 is the 2020 watch of the year, for the amount of features it includes and everything it offers for under 200€.

And with that... thanks for reading!

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. I was waiting for the test to buy it... and I just did it on the i-run link. Looking forward to using it for the first time

    Thank you, Eduardo.

    1. At this point you have two options... buy Stryd and use it with the Vantage and its advantages (zone locking, Stryd control panel), or sell it and buy the Pace 2. The second option is more economical, but you have to evaluate what use you want to make of the power.

    1. I have had no issues with instantaneous pace with the Pace 2 as long as the signal reception has been good. Although I usually use either the average lap pace or the interval pace (which averages the last 10 to 15 seconds).

  2. Good, thank you very much for your work, have you tried it swimming???I want it for triathlon, how do you see it??? thanks

  3. I do not know what problems there may be in that the screen is tactile in a sports watch, for some time there is the possibility of blocking by software that ability. Anyway, fortunately in the next fénix 7 there will be a version with Amoled screen and it will be tactile and can be locked when doing sport, do not go to complain someone hehehehe.

  4. Brutal analysis as always! One question, as it has no trail mode, can you set the race mode to show you the positive elevation gain and data such as the slope?

  5. Congratulations and thank you for the analysis of the device.
    Several doubts:
    The crown seems impractical if you want to change screens while running. I find it much easier to press a button. How does it feel? Resistant, flimsy? It gives the feeling that with use it will end up breaking, either by turning it or by combining poder pressing and turning it.
    I am hesitating between the 245 and this one. I am clear about the differences, but the crown is throwing me back.
    On the other hand on the subject of intervals, is it possible to select interval by time, distance, manual lap as in the Garmin? That is to say first intense interval determined by hitting the lap button, and recovery marked by time. In Suunto, I think that from the clock can not be configured that way. Or by distance or time, but not combination of both with manual lap. I don't know if I've made myself clear, but I think if you've used Garmin you'll know what I mean.
    Regarding the other possibilities of the watch, I like them a lot and I find them very interesting. They allow you to look at other parameters, and if you have someone who trains you, maybe they are not so important to have them or not, but those two I see them quite limiting and that can make me opt for one or the other. Since the 40€ difference between one and the other is not money in the long run.
    Thank you very much in advance.

    1. About the crown, it is all a matter of habit. Once used to it, it is just another control method, neither better nor worse. The feel and operation is good, I have no objections.

      Interval programming is very similar to Garmin, both from the watch in single intervals and from interval programming through the app. And one of the options is to switch intervals with the lap button (or if by time or distance, it will also switch intervals by pressing the button).

      1. Thank you very much for your answer.
        I understand that I can program the intervals both from the clock and from the app by doing the first one using the lap button (Example of 1000 on track: 6×1000 r:1') 1000 (lap button), recover (1' programmed) and go back out, without being aware of the lap time. On the Garmin I know it can be done but on Suunto I don't think so. I am tempted by this watch for different things it offers such as power, try to interpret it, and see how fatigue progresses, etc. without the need for external devices. In the end the rest of the functions, are fine, but it's all about running. To try something different.

          1. I was saying this because I downloaded the application and when I tried to program series or see how it worked, I saw that 1TP10I could set time/distance but not manual lap and recovery by time.

          2. In the watch there is a manual lap option. Anyway I insist, as in Garmin you can go from phase to phase directly by pressing the lap button, regardless of what is marked as time or distance target.

  6. Congratulations on the analysis and the work behind it all.
    I have some questions about the pace2 chorus. Isn't the crown impractical for changing screens while running? I think it is much simpler and more precise to press a button and change the display than having to turn the wheel. On the other hand, how does the crown feel? It gives the feeling that it is going to break or that with use by combining turning and pressing and that it is very flimsy and in the long run is going to give problems.
    On the other hand, regarding the intervals, can they be configured as in the Garmin? That is to say manual lap and recovery by time. Or you can only set intervals by time-distance as in the Suunto? Does it give a 5" warning before starting like the Garmin? or is it activated directly? If I read correctly, it has vibration and sound?
    I am hesitating between this one and the 245, and these little details I think will make me choose one or the other.
    Thank you very much in advance.

  7. Hi, I am currently using a vantage m and I am really interested in this chorus. Between these two which one would you choose?


    1. If I were to decide between the two I would probably go with the COROS. But if you already have the Vantage M... unless you want to have the TrainingPeaks workouts or are really interested in power training, it might not be worth it.

  8. Hello,
    I want a watch for everyday and multisport (trail and rowing machine mainly).
    I am hesitating between the Pace 2 (199euros) and the Apex (299euros). is it worth paying for the Apex?
    Is there a watch for that price that you think is better?
    Thank you!

    1. Both the COROS PACE 2 and the 42mm APEX will perfectly cover your type of use. With the APEX what you gain is higher quality materials, otherwise both offer the same.

      You could also look at the Garmin Vivoactive 4, they also have rowing support.

  9. I have a doubt regarding the load of the training sessions previously....

    My trainer usually puts time intervals and distance intervals on the same day, is it possible to load this type of training?

    How do you handle advertisements?

    The only app that I have managed to do something similar is RunKeeper but still the warnings are sometimes late...

  10. Buenos Dias estiamdo I have a FR235 but I would like to change my watch for one that gives me more precision, I am between the COROS PACE2 and FR245, which one do you recommend?

    1. If you are already used to the Garmin platform you will probably be more comfortable with the FR245. However, if you want to test with power in a race, then I would opt for the COROS.

      1. Thank you very much Eduardo, if 1TP10We can test with the power in race and for the price it looks the same as the FR245, then what do you recommend me.

  11. good afternoon, first congratulate you for your work, my question is the following what matters most to me is the precision, I have a fenix 5X Plus a S9baro a polar grit x and my old v800, my question would you buy the pace2 for having more precision, of the watches that I have. if the pace has more precision in distance I buy it.
    A salute.

    1. If you are only looking for precision, you will be in a very similar situation with the PACE 2. These are not precision devices and will always be subject to triangulation errors. If you want more accurate pace and distance data, then you should opt for an in-shoe podometer (as that of Polar).

  12. Good afternoon.
    Super interesting and complete your review. I think you have convinced me to change my Fenix 3 HR for this Coros Pace 2, plus I think it can be a way to start understanding power training.
    I will use one of your links for the purchase

    Thank you

  13. Hello, congratulations on the review. I wanted to ask you for advice about the watch, my case is that I have been using a Fenix 5 for some time after having used a Forerunner 735XT. The thing is that with the Fenix 5 I do not go agusto due to its high weight and my wrist, which is very stecha. With the 735XT I was fine but it lacked a barometric altimeter. What I'm looking for is something light for training, even if I wear it on a daily basis I don't care about its functionality as a smartwatch. The altimeter interests me because I run quite a lot in the mountains, unlike the route tracking that I don't care. My question is whether this is a good option to go in search of another more premium model, either a Fenix 6 (which I hear fits better on the wrist), another model of Garmin or Polar. Thanks in advance.
    A salute.

    1. Thank you Manuel.
      The PACE 2 can be a good option, the only thing you have to take into account is that you don't have a specific mountain profile and that there is no route navigation either. Obviously the Fenix 6 has many more functions, but it is much more expensive.

  14. Very good summary, many details that will be very useful to decide the purchase, although I have already bought it, I just need to put it into practice, thanks and a hug from Peru.

  15. Very good analysis. The white silicone strap you see in the pictures which one is it?

    Thank you very much! Greetings

    1. Both are very good choices, each very complete in its own way. You should decide on the platform of one or the other, or on the COROS running power estimation if that is something you are interested in.

      1. Thank you for your response Eduardo.
        Taking advantage of the fact that the price of the FR245 has dropped a little more, I think I'm going to go for this one.


  16. Hello, is this watch valid for hiking? I don't see walking in the sports section. What would I have to put, race mode? Or it does not measure well at low speeds?😅
    Thank you!

    1. It does not have a profile for walking, you would have to use any of the others, such as running. There is nothing wrong with doing so, just that if you are going to walk and run you would not 1TP7You would have to have two profiles set up specifically.

  17. Hello Eduardo, very good review and thanks for your dedication...I would like to ask you a question...what watch would you recommend for less than 200€...for running and crosfit...for me it is important the reliability of the heart rate of the heart rate monitor (I have heart surgery)...I know that the bands are more reliable, but I am very uncomfortable.
    I was evaluating this coros pace 2, before your review I was looking for it with nylon strap, but now I see better silicone...or another option would be better.
    Thank you very much.

    1. For this price it is a good option for those sports. Of course, the optical sensor is perfectly valid for running, but for CrossFit is not the most suitable (within that a chest sensor will also have problems in this type of sport for the movements).

  18. Hello Eduardo, thank you very much for the study. I want to know if in addition to seeing on screen the total accumulated elevation gain of the session, you can see it on the fly but by laps. You can start or finish a manual lap at any time you want and it will tell you the elevation gain of that sector. I've been quite happy with a Polar M400 for years because it allows me to see the cumulative elevation gain very easily (without having an altimeter-barometer), but I think it's not very accurate when it comes to recording small slopes. Do you think that the Pace 2 registers better those small climbs and/or descents? Thank you very much in advance!

  19. Hello,
    For Christmas I bought the Coros Pace 2 Molly Seidel (special edition), I was really happy with it, until a couple of weeks ago I broke the screen, according to customer support the screen is made of resin which obviously does not have the same hardness as sapphire glass (that's what I've been told). I have read that the screen of the Coros Pace is protected by Corning Glass.

    Have you heard anything similar to my case, what are the chances of breaking resin or Corning Glass?

    Greetings and thank you.

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