Between the Band 7 and Smart Band 9, the Band 7 comes out ahead in several specs, while the Smart Band 9 wins on sport modes and battery life. Overall, the Band 7 scores 73.1 and the Smart Band 9 scores 78.8 on our Mars Score.
Which should you buy?
The Smart Band 9 edges ahead on the Mars Score (73.1 vs 78.8), but the 5.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The Band 7 doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the Smart Band 9 if you care most about sport modes and battery life. Its strongest claims are sport modes, battery life.
Both ship with comparable gps, spo2, water resistance, so those specs don't separate the two — focus on the differences below.
Bottom line: the Smart Band 9 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Amazfit - Band 7 wins
- No decisive advantages.
Why Xiaomi - Smart Band 9 wins
- ▲Sport modes — 30.00 more. 150 vs 120.
- ▲Battery life — 16.67% more. 21 days vs 18 days.
Spec comparison
Fitness
| Spec | Amazfit - Band 7 | Xiaomi - Smart Band 9 |
|---|---|---|
| GPS | false | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 120 | 150lead |
Battery
| Spec | Amazfit - Band 7 | Xiaomi - Smart Band 9 |
|---|---|---|
| Battery life | 18 days | 21 dayslead |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Design
| Spec | Amazfit - Band 7 | Xiaomi - Smart Band 9 |
|---|---|---|
| Display size | 1.47 " | 1.62 "lead |
| Weight | 28 g | 16 glead |
Frequently asked
Spec-level deep dives
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