Between the Ring 4 and Gen 2 Smart Ring, the Ring 4 comes out ahead in sport modes, while the Gen 2 Smart Ring wins on battery life. Overall, the Ring 4 scores 52.9 and the Gen 2 Smart Ring scores 57.2 on our Mars Score.
Which should you buy?
The Gen 2 Smart Ring edges ahead on the Mars Score (52.9 vs 57.2), but the 4.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Ring 4 if you care most about sport modes. The biggest gaps in its favor are sport modes.
Pick the Gen 2 Smart Ring if you care most about battery life. Its strongest claims are 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: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Why Oura - Ring 4 wins
- ▲Sport modes — 30.00 more. 40 vs 10.
Why RingConn - Gen 2 Smart Ring wins
- ▲Battery life — 25.00% more. 10 days vs 8 days.
Spec comparison
Fitness
| Spec | Oura - Ring 4 | RingConn - Gen 2 Smart Ring |
|---|---|---|
| GPS | false | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 40lead | 10 |
Battery
| Spec | Oura - Ring 4 | RingConn - Gen 2 Smart Ring |
|---|---|---|
| Battery life | 8 days | 10 dayslead |
| Water resistanceⓘ | 10 ATM | 10 ATM |
Design
| Spec | Oura - Ring 4 | RingConn - Gen 2 Smart Ring |
|---|---|---|
| Display size | 0 " | 0 " |
| Weight | 3.3 g | 2.5 glead |
Spec-level deep dives
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