Review Polar Grit X Pro - “old-new” Grit X? Is it worth to upgrade from Grit X or Vantage V2?

Almost precisely 18 months back (in April 2020) Polar introduced well build watch with nice design intended for outdoor and trail enthusiasts - model Grit X. That time I was very excited about the watch (review in Czech here ). And I wasn’t the only one. Lot of other potential buyers has been excited. Nice design and functions fit for sports were what we only need. However, the excitement didn’t last long. Just until Polar Vatnage V2 was introduced pretty shortly after Grit X. More functions that were not meant to reach the outdoor predecessor. 

New is the sapphire lens which was never used with Polar watches. Despites using sapphire - the display contrast is still great.

These days, Polar will disappoint a little bit its users again. Why? Thing is - many have purchased Grit X, great upgrade from Vantage V, however, in short succession the users were facing dilemma - shall they rather go from fresh Grit X back to Vantage V2 that completely took over all functions and added few more on top? And yet today - these days … here we come again. Those who were looking for features of Vantage V2 and had to sacrifice rugged design of Grit X, they are being offered Grit X Pro, watch with all great features’ Polar offers in a rugged well designed body. On top of it - a sapphire lens and premium bezel materials. 

Grit X Pro is not replacing the former Grit X model and is adding up to the product line of last 2 years. Pro version is more rugged version of Grit X for outdoor enthusiasts, travelers and explorers. But there’s fact that with Vantage V2 and Grit X Pro on the market people won’t be keen to buy the former Grit X model anymore, unless there’s interesting price drop for new piece of Grit X (not likely to happen). 

Features summary

  • Color touch screen
  • Altimeter, barometer, compass
  • Battery duration of 30+ hours in 1 sec. GPS reading
  • Replaceable watch bands
  • Full metal bezel
  • Hill splitter and smart reminder based on energy consuption
  • Strava Live Segments support
  • Weather forecast through Flow 

What’s new on Grit X Pro?

  • New watch faces with altimeter and compass
  • Sapphire lens
  • New materials (including titanium)
  • Music controls (not playback from watch, but remote control for mobile player)
  • New physical tests - same like in Vantage V2 (leg regeneration, cycling test, running test, orthostatic and test of physical condition)


In opposite to Vantage V2 the Grit X Pro are not that lightweight. Thought, it’s not that bad. Grit X Pro are as heavy as any other competitor in this category. Fenix 6, Suunto 9 baro. You can feel the watch mass on the hand, however the watch is placed on your wrist safely without much movement around your hand. Compared to Vantage V2, the Vantage case is bit sleeker. 

However, design wise - the Grit X Pro is simply beautiful, especially the copper version. The bezel has been updated and instead of 4 marks there’s full compass degree scale with N/S/W/E marks. Looks “cool” and I like that :)

Grit X Pro has MIL STD 810G certification and a WR 100m rating.

The copper bezel kind of reminds me of Suunto Kailash copper. But the Kailash model wasn’t that successful like Grit X Pro will be.

The display is still same like with Vantage V2 or Grit X. The active part of the screen is same size and pretty large passive portion of the screen is not the best you can get in today’s world. Polar is just utilizing same parts to get most of the platform for latest products. I feel the Grit X Pro is on the edge and new Polars shall have definitely larger active screen area than the latest model.

The lens on Grit X Pro is made of sapphire. I believe it’s first time in history. The contrast of the screen is, however, not much impacted by the sapphire. Like with Garmin where you can see clear difference in contrast between sapphire and gorilla glass lens. Grit X Pro is well readable under most of the conditions and even in water during swim sessions.

The bands of the Grit X Pro have been redesigned and today, the bands are easily replaceable for any bands with width of 22mm. Basically any band you get from e-bay, aliexpress or so, you can most probably put on the watch. 

copper edice is 78 grams. The titaniuem version has only 58 grams.

Anyway - the new band material used on Grit X Pro is different from the watch bands used previously on any Polar watches. It’s sturdier, slightly heavier and is very stable and durable when comes to exposure to bad weather conditions or chemicals.  

Heart rate sensor

While the longer-term usage of original Grit X (non-Pro) I’ve observed too high readings of HR through the day, the Grit X Pro was as accurate as Vantage V2 for me. There’s not much else to say to the accuracy. All is just fine and surprisingly, the readings are quite close to the HR strap.

The only thing I’m missing in Polar product range is the SpO2 readings. On the other hand, all measures that current Polar watches provide are good enough to provide you feedback on sleep, regeneration, health status and training load. 

GPS accuracy

Despites the current pace might not be spot-on at all the times (sometimes higher, sometimes lower), still it’s very close to the Garmin FR745 or Suunto 9 Peak and slightly better (more accurate) than Polar Vantage V2.

The 1km auto laps are always marked at the same place with deviation of max.1-2m. The testing devices used at same moment during same activities were Grit X Pro, Vantage V2, Garmin FR 745 and Suunto 9. Thus, the main competitors of Grit X Pro.

By me, Grit X Pro is very accurate sports watch in many aspects. Though - Polar is yet missing the multiband GPS chipset and yet, is one of the most accurate watches today. The forrest with dense trees or higher hills around me were not preventing the track to be located properly.

With Grit X Pro you can set at the start of the activity GPS readings by 1, 60 or 120 seconds. Or you can even switch the GPS off completely.

Battery life

Grit X Pro are built to last long, to last the elements. And … they are!


Run time (hours)

1 sec. GPS reading

62:25 hrs

Grit X Pro is the first Polar GPS watch with such long battery life with GPS reading. Clearly, one and half year ago Coros started a hunt for extremely long battery life. When Garmin joined the family of endurance models with their model Enduro, Polar didn’t want to stay aside. 

Sensors/pods pairing

Grit X Pro support a large scale of external sensors and pods. They can, however, pair only BT sensors. No ANT+ compatibility. That’s one disadvantage out of two, that are crucial for me. The watch can pair literally anything. From HR sensors through pedal based wattmeters through smart trainers.

Speaking of bike smart trainers, here comes the second thing I didn’t like. The issue for me is that the watch cannot control any smart trainer (in my case Tacx Neo 2T). To keep it simple - if you pair Garmin to the bike smart trainer, you can control the trainer difficulty from your Garmin. On top of it - if you upload any route to the Garmin (shall include elevation profile), you can actually “navigate” through the virtual profile that’s stored in your Edge computer or watch. The watch controls angle a resistance automatically based on the route profile. The watch simply don’t support FE-C protocol.  

Another disadvantage is that, if paired to a power meter or bike smart trainer, there won’t be automatically added screens with metrics coming from these accessories - not showing speed, cadence, watts. Anyway - the values are being recorded, not shown however. Simply no watts on screen, unless you modify the screens in the app and sync it to the watch. Pretty annoying, considering that Garmin has this already for few years. Good one is that Suunto does the same. :)

Good about other sensors, if they’re Polar, they get automatically connected. On top, you can use also Stryd which (for running) replaces internal power calculations during run session and you get right away readings from Stryd. Right after connecting the pod in the menu. 

Smart energy refueling

For those who can speak Czech or are good with google translate, in my recent reviews of Polar products, you’d know I was speaking about smart energy refuel alarms. These are set based on energy consumption during the activity. Depending on the activity duration and your heart rate, the watch computes your energy consumption. You define how much carbs is in your refueling doses and the watch just tells you when to use them. Good one, isn’t it? 

Hill splitter, usage of energy sources, planning

Further, Grit X Pro has (also like predecessors) a function called „hill splitter“. That’s advanced statistics on how many hills, what was the incline and duration etc.of your climbs. It’s good to keep an overview, however, during the activity? I don’t use it.

What’s bit more interesting - for post training analysis, is the stats of energy sources used during which part. You can see graph of split lines where one represents fat and the other carbs burning.

Planning is another good thing in Polar Flow and particularly in Polar environment as such. So far the planning was only good at Garmin and Polar. Later Coros joined and unfortunately - Suunto dropped from the option of planning training sessions (intervals).

You can have predefined training plans by Polar synced to the watch for daily trainings or simply create your own training units for a day.

If you’d like to plan a route, it’s not as easy as with Garmin or Suunto. You’d need to import routes from other apps. Easiest is sync from Komoot, that’s directly supported and actually, you’ll get some maps for free in Komoot environment together with purchase of the Polar watch. The other option of online sync is Strava. Or … any other routes in GPX format and import to Polar Flow.

Training recommendations

I believe it’s Polar who started first training recommendations ever in a sports watch. So is now as well. Grit X Pro will offer you training recommendations based on your fitness, recent training load and regeneration. The full insight on how this works is worth of standalone article … which I wrote, by the way - but it’s in Czech … feel free to use google translate :) That article is about overall usage of training watches for injury prevention and is based on general info.

However and specifically to Polar - Polar is the only brand that gives you daily training advices on what/how to exercise to compensate swim, bike and run activities … of course it gives you the running/bike recommendations too, but it gives you also cardio recommendations, core exercise, etc. That’s making Polar among the others.


Unfortunately, the navigation features of Polar are not evolving much or even at all. It’s not bad, but eigher not perfect. Could be way better. If only Polar copied few functions from Garmin at least. Not speaking of maps of course. But what makes it impossible to provide me with estimated arrival time? What prevents Polar from implementing feature like climb pro? Copying between brands is anyway daily routine in this world so … who cares? It’s about customers buying the watch. Such small nice features are making navigation lot better, comfortable and user friendly.

Anyway - it has nav features, they work, they work well and that’s what you need in the end. :)

As additional feature I’d suggest for “local heroes” using the free voucher in Komoot to unlock local region. For world travelers 20 Eur on top for lifetime whole world unlocking in Komoot is just pie nut and is worth of it. You’ll get full routing including turn by turn navigation. 

Running power

As mentioned briefly earlier in the review, the Grit X Pro, like predecessors, does support running power readings from the wrist. The data are consistent at various scenarios; thus you can drive training by the watts for sure. However, it works only where is the GPS signal. 

The running power is by default one of the data screens available. If you pair Stryd sensor, the power will automatically go from the Stryd. So just in case, you’d be training by power, make sure you will change the power zones once you attach Stryd to the watch - the power readings have different levels from the Polar watch and Stryd.

Smart functions

Grit X Pro support notifications and events displayed from mobile. The messages from mobile notifications center are all displayed on the Grit X Pro. You can chose whether to allow being disturbed during activity, or not.

Polar lately introduced “quiet hours” mode during which are the notifications purged and you’r enot disturbed by watch light and vibrations while you sleep.

With the Grit X Pro, like with Vantage V2, you can control playback of any media in your connected phone. The playback controls are on one of the watch faces and also displayed during an activity on one of the “data screens”.

Sleep tracking

Despites the size of the watch on my relatively small wrist, the sleep tracking is OK and the watch is noticeable on your wrist, however you can quickly get used of overnight wearing it. 

The accuracy of the measurement is good. Unfortunately it happens that even if you follow Polar’s instructions on fastening the watch on your wrist, the measurement fails.

Grit X Pro and recovery measurements can be select to either one of following: Recovery Pro or Nightly Recharge which is also advantage against the model Grit X. 


Good news is that even owners of Vantage V2, who started to be jealous about new features of Grit X Pro, are already getting all those features and functions through the firmware update. Thus there are two identical watches on the market - in terms of functions, in two different housings. 

One is sleek, light, made for athletes, the other rugged, durable, nice looking watch made for explorers and outdoor fans.

By me, personally, the Grit X Pro is again well build watch. I like the design, the idea and all promotions by Polar. However I’m afraid, still they cannot beat the technologies and functions built into Garmin watches. Also the price point is on one hand reasonable (for Polar) but on the other hand is as high as Garmin Fenix 6 Pro or Fenix 6X Pro watches, where you’re getting superb navigation functions and maps. And payments. And on-board music.

If only Polar introduced all their watches 1-2 years earlier, they’d be great competitors. However introducing of Coros Vertix 2 with multiband chipset, expectation of new series of all Garmin watches, including next generation of Fenix family … those are unfortunately factors speaking against otherwise very nice watches.

As sports tracker and training partner, however, is the Polar Grit X Pro sufficient enough for any of your adventures or training targets for next couple of years.

I’d say - if you’re fan of Polar, or you like for some reason this watch, go for it. It won’t disappoint you. 


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