Oura Oura Ring 4 vs Ultrahuman Ring AIR
Oura Oura Ring 4 ($349) vs Ultrahuman Ring AIR ($349) — side-by-side specs, weight, pros and cons to help you pick the right smart ring.
Spec-by-spec
| Spec | Oura Oura Ring 4 | Ultrahuman Ring AIR |
|---|
| Price | $349 | $349 |
| Weight | 6g | 3g |
| Form | Ring (sizes 4–15) | — |
| Battery | 8 days | Up to 6 days |
| Sensors | HRV, Temp, SpO2, HR | PPG, Temp, Accel |
| Subscription | $5.99/mo | — |
| WR | 100m | 100m |
| Weight | 4–6g | 2.4–3.6g |
| Sub | — | None (free forever) |
| Material | — | Titanium |
Pros & Cons
Oura Oura Ring 4
- Most discreet health tracker
- 8-day battery
- Excellent HRV + sleep data
- No wrist bulk
- Works alongside any watch
- Subscription required $5.99/mo
- No display
- Ring sizing requires order kit
Ultrahuman Ring AIR
- No subscription ever
- 2.4g ultralight titanium
- Sleep + HRV + temperature
- 100m water resistant
- Free app with all features
- Smaller sensor array than Oura
- Newer ecosystem
- Sizing kit required
Oura Oura Ring 4 is the better value at $349. If weight matters most, Ultrahuman Ring AIR carries lighter at 3g. Both are part of our curated smart ring index — tap through to check current pricing.