Oura Ring 4 vs Ultrahuman Ring Air
The polished, subscription-led incumbent against the no-fee challenger — which smart ring should you wear?
Challenger
Ultrahuman Ring Air
Oura-class sleep data with no membership; the app is busier and metabolic features are still maturing.
8.6
Champion
Oura Ring 4
Best-in-test sleep staging and HRV, the most polished app — held back only by the monthly fee.
9.0Winner
Spec for spec
| Spec | WinnerOura Ring 4 | Ultrahuman Ring Air |
|---|---|---|
| Price | $349 | $349 |
| Battery life | ~7 days | ~6 days |
| Form | Titanium ring | Titanium ring |
| Sleep tracking | Best-in-test staging | Strong |
| Subscription | Required ($5.99/mo) | None |
| Water resistance | 100m | 100m |
| FitHQ score | 9.0 / 10 | 8.6 / 10 |
Who should buy which
The Oura Ring 4 wins on sleep-staging accuracy and app polish, and it's our overall pick. But if you refuse a subscription, the Ultrahuman Ring Air gets you most of the way there for no monthly fee.
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Disclaimer. Scores and picks are from our test bench and may change as new products are logged. FitHQ may earn a commission on purchases made through links on this page.