Polar Grit X
Where It Has the Edge
- cross-platform compatibility is 4.3 vs 2.8. Cross-platform evidence was limited but positive, with Polar Flow available for both Android and iOS.
- battery life is 4.0 vs 3.3. Battery life was one of the most mixed areas: GPS endurance and power modes impressed, but daily runtime...
- button controls is 4.3 vs 3.9. Button controls were a consistent strength, with better texture, responsiveness, click feel, and glove usability than the touchscreen.
- sleep tracking accuracy is 4.1 vs 3.8. Sleep tracking was broadly useful and sometimes accurate, though one review noted false sleep detection during quiet sofa...