Polar Grit X
Where It Has the Edge
- cross-platform compatibility is 4.3 vs 3.0. Cross-platform evidence was limited but positive, with Polar Flow available for both Android and iOS.
- battery life is 4.0 vs 3.1. Battery life was one of the most mixed areas: GPS endurance and power modes impressed, but daily runtime...
- GPS accuracy is 4.2 vs 3.4. GPS accuracy was usually described as solid, snappy, or spot-on, though the exact margin varied by terrain and...
- charging speed is 4.2 vs 3.4. Charging speed evidence was limited but positive, with one reviewer measuring about an hour after a week of...