Smart Ring Competition Heats Up
Samsung Galaxy Ring 2 enters the smart ring market with improved sensors, longer battery, and deeper Samsung Health integration. We wore it daily for 60 days alongside Oura Ring 4 and Ultrahuman Ring Air for comparison.
Sensor Accuracy
Heart Rate
Compared to chest strap reference, Galaxy Ring 2 averaged 97.2% accuracy during rest and 94.8% during exercise. Matches Oura Ring 4 performance.
Sleep Tracking
Sleep stage detection aligned with our polysomnography reference 82% of the time—impressive for a finger-worn device. REM and deep sleep detection improved significantly over Gen 1.
Blood Oxygen (SpO2)
Continuous SpO2 monitoring showed consistent readings within 2% of medical-grade pulse oximeters. Useful for altitude training and sleep apnea screening.
Battery Life
7 days with continuous health monitoring, NFC payments, and gesture controls. Charging case provides 2.5 additional charges. Full charge takes 80 minutes.
Samsung Health Integration
Energy Score combines sleep, activity, and HRV data into a daily readiness metric. The ring adds gesture controls—pinch to dismiss alarms or take photos remotely.
Verdict
Galaxy Ring 2 is the best smart ring for Samsung ecosystem users. Oura still wins for platform-agnostic sleep science. Both are excellent choices.
