Wearable sleep tracker
Oura Ring
by Oura Health
wearable sleep hrv recovery ring biometrics temperature readiness
About this product
The Oura Ring is a smart ring that continuously monitors sleep stages, heart rate variability (HRV), skin temperature, and activity. Its algorithms synthesise these signals into daily Readiness, Sleep, and Activity scores delivered via a companion app.
The ring requires a monthly subscription after the initial hardware purchase. Gen 4 added daytime heart rate tracking and period prediction features.