Our verdict in short
The Ultrahuman Ring Air is a light, comfortable smart ring with no subscription and good overnight HRV and sleep data. Two problems hold it back: many owners report the battery failing within months, and it has been banned from US sale since October 2025. In the US, buy the Ultrahuman Ring Pro or another ring instead. Outside the US it is still an option, but only with a clear return and warranty path.
Can you still buy the Ultrahuman Ring Air in the US?
No — not new from Ultrahuman. In 2025 the US International Trade Commission found that Ultrahuman’s rings infringed an Oura patent. The exclusion order took effect on 21 October 2025. Since then the Ring Air cannot be imported into the US. Retailers could sell only the stock they already had, and Ultrahuman said it would keep supporting rings bought after that date. In practice, a Ring Air in the US today is leftover stock or a used ring.
Ultrahuman’s answer is the Ring Pro: announced in February 2026, US pre-orders from March 2026, shipping since June 2026, $479 one-time with no subscription and a stated battery life of up to 15 days. If you are in the US and want an Ultrahuman ring, that is the one to buy. Outside the US, Ultrahuman still sells the Ring Air for about $349 (£329 in the UK).
What does the Ultrahuman Ring Air measure — and how well?
The ring uses an optical sensor (PPG) on the inside of the finger. It reads heart rate and HRV continuously, updating every few minutes at rest, plus skin temperature, blood oxygen and movement. From these it builds sleep stages, a recovery score and daily readiness.
The night is where a ring is strongest. You lie still, which keeps the signal clean, and in overnight recordings from 13 people (Dial 2025) Oura Ring 4 was among the closest to ECG. There is less independent research on the Ring Air itself, so we score it a little below Oura on accuracy. Daytime HRV during movement is a rough estimate on every ring. To read your numbers, compare them with normal HRV by age — and, above all, with your own baseline.
How much does the Ultrahuman Ring Air cost?
About $349 one-time outside the US. There is no membership: all features and your data history are included. Over two years that is cheaper than an Oura Ring 4 ($349 plus $5.99 per month). But if the battery fails after a year, the low total cost disappears — so check the warranty in your country before you buy.
| Ring | Price | Subscription | US availability | |---|---|---|---| | Ultrahuman Ring Air | ~$349 | none | banned since Oct 2025 | | Ultrahuman Ring Pro | $479 | none | yes | | Oura Ring 4 | from $349 | $5.99/month | yes | | RingConn Gen 2 | $299 | none | yes |
What are the downsides of the Ultrahuman Ring Air?
The main one is battery reliability. Through 2025 and 2026, reviewers and owners have reported Ring Air batteries losing capacity fast or dying within months. A recovery wearable has to work every night; a ring you cannot trust to last is a serious problem. The US ban is the second issue: no new US sales, and buying grey-import stock makes warranty claims harder. Data access is middling — some export, no fully open API — and there is no display.
Who should buy the Ultrahuman Ring Air — and who should not?
Buy it if you live outside the US, want a very light ring with no subscription, and can buy from a seller with an easy return and warranty process.
Skip it if you are in the US (get the Ring Pro — see Ring Pro vs Ring Air), or if long-term reliability matters most to you. Then the Oura Ring 4 (see Oura Ring 4 vs Ultrahuman Ring Air) or the cheaper RingConn Gen 2 (see RingConn Gen 2 vs Ultrahuman Ring Air) are safer choices.
For the full field, see the best HRV trackers of 2026.
Background reading
The science behind why HRV is the signal worth tracking — and how the body produces it.
- Normal HRV by age — what a typical HRV looks like at your age, and why your own trend matters more
- Resonant-frequency system coherence — what resonance-frequency breathing is and what the studies show
- Interoceptive precision and sensor calibration — why your own perception is the upstream baseline HRV measures against
- Anti-entropy neural architecture — HRV as the daily maintenance signal of the autonomic system