Overdue for a refresh — no successor announced yet. Prices should be at their lowest
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.
Full details →Overdue for a refresh — no successor announced yet. Prices should be at their lowest
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 9 | Polar Grit X | |
|---|---|---|
| Tier | Fitness Tracker | Sports GPS |
| Platform | iOS & Android | iOS & Android |
| Battery | 14 days | 40 days |
| Always-on display | ✅ | ❌ |
| GPS | ❌ | ✅ |
| Cellular | ❌ | ❌ |
| Health sensors | hr, spo2, stress, sleep | hr, spo2, hrv, running power |
| Released | Jul 22, 2024 | Mar 14, 2023 |
| Cycle length | 365 days | 873 days |
| Cycle advice | bad | bad |
| Deals advice | good | good |
| Next model | — | — |
Most fitness trackers at this price use basic LCD displays. The Smart Band 9 brings a vivid AMOLED always-on screen — rare at this price point.
Continuous heart rate, SpO2, stress, and sleep tracking — all running for 2 weeks before charging. Most smartwatches last 1–2 days.
Full functionality on both platforms via the Mi Fitness app, including notifications, sleep analysis, and health trends.
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.