Oura Ring 4 Top pick
The recovery wearable to beat. The ring form factor reads sleep, heart-rate variability, and resting heart rate more comfortably than a watch, and the Readiness score turns those signals into a single "go hard or back off" number each morning. Up to 8 days of battery.
- Sleep staging + HRV + resting HR
- Daily Readiness / recovery score
- Up to 8-day battery life
- Requires Oura membership