Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Amazfit - Band 7 | Google - Fitbit Charge 6 |
|---|---|---|
| Battery life | 18 days | 7 days |
| Sport modes | 120 | 40 |
| GPS | false | true |
Between the Band 7 and Fitbit Charge 6, the Band 7 comes out ahead in battery life / sport modes, while the Fitbit Charge 6 wins on gps. Overall, the Band 7 scores 72.2 and the Fitbit Charge 6 scores 77.4 on our Mars Score.
Which should you buy?
The Fitbit Charge 6 edges ahead on the Mars Score (72.2 vs 77.4), but the 5.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Band 7 if you care most about battery life / sport modes. The biggest gaps in its favor are battery life, sport modes. The single most decisive one: Battery life — 157.14% more. 18 days vs 7 days.
Pick the Fitbit Charge 6 if you care most about gps. Its strongest claims are gps. The single most decisive one: Has GPS.
Both ship with comparable spo2, water resistance, so those specs do not separate the two — focus on the differences below.
Bottom line: the Fitbit Charge 6 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Amazfit - Band 7 or Google - Fitbit Charge 6?
Google - Fitbit Charge 6 leads the current Mars Score by 5.2 points.The more useful decision is the trade-off behind that result: compare battery life, gps against the way you will actually use the product.
Choose Amazfit - Band 7 if…
Amazfit - Band 7 has the measurable edge on battery days, sport modes.
Choose Google - Fitbit Charge 6 if…
Google - Fitbit Charge 6 has the measurable edge on has gps.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Amazfit - Band 7 wins
- ▲Battery life — 157.14% more. 18 days vs 7 days.
- ▲Sport modes — 80.00 more. 120 vs 40.
Why Google - Fitbit Charge 6 wins
- ▲Has GPS.
Spec comparison
Fitness
| Spec | Amazfit - Band 7 | Google - Fitbit Charge 6 |
|---|---|---|
| Form factor | Band | Band |
| GPS | false | truelead |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 120lead | 40 |
Battery
| Spec | Amazfit - Band 7 | Google - Fitbit Charge 6 |
|---|---|---|
| Battery lifeⓘ | 18 dayslead | 7 days |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Design
| Spec | Amazfit - Band 7 | Google - Fitbit Charge 6 |
|---|---|---|
| Display size | 1.47 "lead | 1.04 " |
| Weight | 28 glead | 37 g |