Between the Apex 2 and Grit X2 Pro, the Apex 2 comes out ahead in smartwatch mode / gps mode, while the Grit X2 Pro wins on multi-band gps / ecg. Overall, the Apex 2 scores 47.2 and the Grit X2 Pro scores 42.6 on our Mars Score.
Which should you buy?
The Apex 2 edges ahead on the Mars Score (47.2 vs 42.6), but the 4.6-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Apex 2 if you care most about smartwatch mode / gps mode. The biggest gaps in its favor are smartwatch mode, gps mode.
Pick the Grit X2 Pro if you care most about multi-band gps / ecg. Its strongest claims are multi-band gps, ecg.
Both ship with comparable solar charging, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Why Coros - Apex 2 wins
- ▲Smartwatch mode — 70.00% more. 17 days vs 10 days.
- ▲GPS mode — 4.65% more. 45 h vs 43 h.
Why Polar - Grit X2 Pro wins
- ▲Has Multi-band GPS.
- ▲Has ECG.
Spec comparison
GPS & Sensors
| Spec | Coros - Apex 2 | Polar - Grit X2 Pro |
|---|---|---|
| Multi-band GPS | false | truelead |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | false | truelead |
| Pulse Ox | true | true |
Battery
| Spec | Coros - Apex 2 | Polar - Grit X2 Pro |
|---|---|---|
| Smartwatch mode | 17 dayslead | 10 days |
| GPS mode | 45 hlead | 43 h |
| Solar charging | false | false |
Design
| Spec | Coros - Apex 2 | Polar - Grit X2 Pro |
|---|---|---|
| Case size | 43 mm | 47.5 mmlead |
| Weight | 53 glead | 79 g |
| Water resistanceⓘ | 5 ATM | 10 ATMlead |
Spec-level deep dives
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