Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Google - Fitbit Charge 6 | Samsung - Galaxy Fit 3 |
|---|---|---|
| Battery life | 7 days | 13 days |
| Sport modes | 40 | 100 |
| GPS | true | false |
Between the Fitbit Charge 6 and Galaxy Fit 3, the Fitbit Charge 6 comes out ahead in gps, while the Galaxy Fit 3 wins on battery life / sport modes. Overall, the Fitbit Charge 6 scores 77.4 and the Galaxy Fit 3 scores 70.9 on our Mars Score.
Which should you buy?
The Fitbit Charge 6 edges ahead on the Mars Score (77.4 vs 70.9), but the 6.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Fitbit Charge 6 if you care most about gps. The biggest gaps in its favor are gps. The single most decisive one: Has GPS.
Pick the Galaxy Fit 3 if you care most about battery life / sport modes. Its strongest claims are battery life, sport modes. The single most decisive one: Battery life — 85.71% more. 13 days vs 7 days.
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: Google - Fitbit Charge 6 or Samsung - Galaxy Fit 3?
Google - Fitbit Charge 6 leads the current Mars Score by 6.5 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 Google - Fitbit Charge 6 if…
Google - Fitbit Charge 6 has the measurable edge on has gps.
Choose Samsung - Galaxy Fit 3 if…
Samsung - Galaxy Fit 3 has the measurable edge on battery days, sport modes.
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 Google - Fitbit Charge 6 wins
- ▲Has GPS.
Why Samsung - Galaxy Fit 3 wins
- ▲Battery life — 85.71% more. 13 days vs 7 days.
- ▲Sport modes — 60.00 more. 100 vs 40.
Spec comparison
Fitness
| Spec | Google - Fitbit Charge 6 | Samsung - Galaxy Fit 3 |
|---|---|---|
| Form factor | Band | Band |
| GPS | truelead | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 40 | 100lead |
Battery
| Spec | Google - Fitbit Charge 6 | Samsung - Galaxy Fit 3 |
|---|---|---|
| Battery lifeⓘ | 7 days | 13 dayslead |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Design
| Spec | Google - Fitbit Charge 6 | Samsung - Galaxy Fit 3 |
|---|---|---|
| Display size | 1.04 " | 1.6 "lead |
| Weight | 37 g | 18.5 glead |