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Head-to-head buyer guide
Oura Ring Gen 4 vs Ultrahuman Ring AIR
Specs, prices, editor verdict, and who should buy which — compared side-by-side.
By Ryan · Editor & Founder
Published May 3, 2026
The verdict
These are close picks. Both score in the same range. The right call depends on buyer profile — read the per-buyer recommendations below.
Side-by-side specs
| Spec | Oura Ring Gen 4 | Ultrahuman Ring AIR |
|---|---|---|
| price | $349–$499/yr | $349–$449 |
| battery | 8 days | 6 days |
| metrics | HRV, sleep, temperature, SpO2, activity | HRV, sleep, temperature, SpO2, activity |
| subscription | $5.99/mo or $69.99/yr | None — included in hardware |
| sizes | 6-13 | 5-14 |
| material | Titanium | Titanium |
Who should buy which
Pick the Oura Ring Gen 4 if
Anyone serious about sleep, HRV, and daily readiness who wants the longest-running, most-validated ring on the market.
Skip if
You hate subscription pricing (try Ultrahuman), or you're an elite athlete who needs strain-coaching depth (try Whoop).
Pick the Ultrahuman Ring AIR if
Buyers who want ring-form tracking without a recurring subscription, especially those starting fresh without Oura's historical data.
Skip if
You're already on Oura with years of data, or you want the maximally validated sleep-staging accuracy.