The 2025 Physiological Reports validation study tested all three against medical-grade ECG across 536 nights. Oura Ring Gen 4 came…
Oura is no longer the only serious smart ring. RingConn, Ultrahuman, and Samsung Galaxy Ring offer comparable accuracy without subscription.…
Step-count wearables miss recovery entirely. Oura, Whoop, and Garmin all measure HRV — but each calculates recovery differently. Head-to-head with…
Oura Ring 4 vs Gen3 in 2026 — battery life, sensors, sizing, and price compared. Plus a complete buying guide…
