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 / 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 does not 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 / battery life. Its strongest claims are sport modes, battery life.
Both ship with comparable gps, spo2, water resistance, so those specs do not 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 |
Spec-level deep dives
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