Late in cycle — a new model is likely coming
Best for: Anyone who wants basic health tracking — steps, sleep, heart rate, SpO2 — without spending more than $40 or carrying a bulky watch. Works with both iPhone and Android. A popular choice for kids, older adults, and budget-conscious fitness beginners who want the world's top-selling fitness band.
Full details →Late in cycle — a new model is likely coming
Best for: Trail runners, hikers, and outdoor athletes who want Polar's analytics with significantly longer battery life than the Vantage V3. The titanium case and sapphire glass make it suitable for technical terrain where watch durability matters.
Full details →| Xiaomi Smart Band 10 | Polar Grit X | |
|---|---|---|
| Tier | Fitness Tracker | Sports GPS |
| Platform | iOS & Android | iOS & Android |
| Battery | 21 days | 40 days |
| Always-on display | ✅ | ❌ |
| GPS | ❌ | ✅ |
| Cellular | ❌ | ❌ |
| Health sensors | hr, spo2, stress, sleep | hr, spo2, hrv, running power |
| Released | Jun 30, 2025 | Apr 11, 2024 |
| Cycle length | 343 days | 873 days |
| Cycle advice | bad | bad |
| Deals advice | good | good |
| Next model | — | — |
The Smart Band 10's 1.72" display peaks at 1500 nits — 200 nits brighter than the Band 9 — making it more readable in sunlight, all for around $40.
Continuous heart rate, SpO2, stress, and sleep tracking — all running for 3 weeks before charging. Seven more days than the already impressive Band 9.
Full functionality on both platforms via the Mi Fitness app, including notifications, sleep analysis, and health trends. Bluetooth 5.4 for improved connection stability.
Five times the battery of the Vantage V3 — enough for week-long mountain stages or ultramarathons without charging access.
Automatically segments your run by uphill and downhill sections, calculating pace and power for each — essential for mountain race training.
Running power without a chest strap or foot pod — Polar's key differentiator versus Garmin at this price tier.