Between the Charge 6 and Ring 4, the Charge 6 comes out ahead in gps, while the Ring 4 wins on battery life and water resistance. Overall, the Charge 6 scores 50.7 and the Ring 4 scores 52.9 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (50.7 vs 52.9). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Charge 6 if you care most about gps. The biggest gaps in its favor are gps.
Pick the Ring 4 if you care most about battery life and water resistance. Its strongest claims are battery life, water resistance.
Both ship with comparable sport modes, spo2, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Google - Charge 6 wins
- ▲Has GPS.
Why Oura - Ring 4 wins
- ▲Battery life — 14.29% more. 8 days vs 7 days.
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
Spec comparison
Fitness
| Spec | Google - Charge 6 | Oura - Ring 4 |
|---|---|---|
| GPS | truelead | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 40 | 40 |
Battery
| Spec | Google - Charge 6 | Oura - Ring 4 |
|---|---|---|
| Battery life | 7 days | 8 dayslead |
| Water resistanceⓘ | 5 ATM | 10 ATMlead |
Design
| Spec | Google - Charge 6 | Oura - Ring 4 |
|---|---|---|
| Display size | 1.04 "lead | 0 " |
| Weight | 37 g | 3.3 glead |
Frequently asked
Spec-level deep dives
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