Ultrahuman Ring AIR

If you want reliable sleep, recovery and basic activity data without committing to a monthly plan, a smart ring is the least intrusive way to collect it — the Ultrahuman Ring AIR focuses on sleep staging, HRV, skin temperature and recovery guidance so you can make better training and rest decisions. ## What makes it worth it The Ring AIR is seriously light and thin — at about 2.4g and 2.45mm it’s barely noticeable on your finger, which improves night-time comfort and therefore sleep data quality. It packs the usual smart‑ring sensors (PPG heart‑rate, HRV, skin temperature and motion) and delivers detailed sleep stages (REM, deep, light and wake) inside Ultrahuman’s app, while keeping core features free of a subscription. Ultrahuman also includes targeted women’s‑health features (cycle tracking, a 7‑day fertile window prediction and a pregnancy mode) that many rivals gate behind subscriptions. ## Where it falls short The app and interface are less polished than the most mature rivals and some reviewers note the finish feels cheaper and picks up scratches more easily. Battery endurance is good but not class‑leading (around four days in many tests), so you’ll charge it more often than a few competitors that advertise longer runtimes. Buyers who want unobtrusive, subscription‑free sleep and recovery tracking will like the AIR, while anyone who prioritises a premium finish, the longest possible battery life, or the smoothest app experience should look at Oura or higher‑end alternatives.

£329