Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Oura - Ring 4 | RingConn - Gen 2 Smart Ring |
|---|---|---|
| Sport modes | 40 | 10 |
| Battery life | 8 days | 10 days |
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 63.8 and the Gen 2 Smart Ring scores 65 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (63.8 vs 65). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Ring 4 if you care most about sport modes. The biggest gaps in its favor are sport modes. The single most decisive one: Sport modes — 30.00 more. 40 vs 10.
Pick the Gen 2 Smart Ring if you care most about battery life. Its strongest claims are battery life. The single most decisive one: Battery life — 25.00% more. 10 days vs 8 days.
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.
Which should you buy: Oura - Ring 4 or RingConn - Gen 2 Smart Ring?
RingConn - Gen 2 Smart Ring leads the current Mars Score by 1.2 points.The more useful decision is the trade-off behind that result: compare battery life against the way you will actually use the product.
Choose Oura - Ring 4 if…
Oura - Ring 4 has the measurable edge on sport modes.
Choose RingConn - Gen 2 Smart Ring if…
RingConn - Gen 2 Smart Ring has the measurable edge on battery days.
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 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 |