Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Google - Fitbit Charge 6 | Garmin - vivosmart 5 |
|---|---|---|
| Sport modes | 40 | 14 |
| GPS | true | false |
Between the Fitbit Charge 6 and vivosmart 5, the Fitbit Charge 6 comes out ahead in sport modes / gps, while the vivosmart 5 wins on several specs. Overall, the Fitbit Charge 6 scores 77.4 and the vivosmart 5 scores 63.9 on our Mars Score.
Which should you buy?
The Fitbit Charge 6 is the clear pick on raw spec strength, leading by 13.5 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Fitbit Charge 6 if you care most about sport modes / gps. The biggest gaps in its favor are sport modes, gps. The single most decisive one: Sport modes — 26.00 more. 40 vs 14.
The vivosmart 5 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable battery life, 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 Garmin - vivosmart 5?
Google - Fitbit Charge 6 leads the current Mars Score by 13.5 points.The more useful decision is the trade-off behind that result: compare 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 sport modes, has gps.
Choose Garmin - vivosmart 5 if…
Garmin - vivosmart 5 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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
- ▲Sport modes — 26.00 more. 40 vs 14.
- ▲Has GPS.
Why Garmin - vivosmart 5 wins
- No decisive advantages.
Spec comparison
Fitness
| Spec | Google - Fitbit Charge 6 | Garmin - vivosmart 5 |
|---|---|---|
| Form factor | Band | Band |
| GPS | truelead | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 40lead | 14 |
Battery
| Spec | Google - Fitbit Charge 6 | Garmin - vivosmart 5 |
|---|---|---|
| Battery lifeⓘ | 7 days | 7 days |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Design
| Spec | Google - Fitbit Charge 6 | Garmin - vivosmart 5 |
|---|---|---|
| Display size | 1.04 "lead | 0.73 " |
| Weight | 37 g | 26 glead |