Oura Ring Generation 3

Worn as a ring rather than a wristband, Oura Ring Generation 3 focuses on sleep patterns and recovery in a discreet, jewelry-style form. Optical sensors track signals used to estimate heart rate, heart rate variability and breathing rate, while separate temperature sensors measure changes relative to a personal baseline. The app brings this information together through Sleep, Readiness and Activity scores. The ring has no display, so reviewing trends requires the companion app.

Battery life is advertised at up to seven days, depending on use and battery condition, and a membership provides access to the fuller set of data and insights. It suits people who prioritize overnight tracking and daily recovery context over on-wrist workout information. Its distinguishing trait is the small form factor, though comfort depends on fit and its readings should not be treated as medical diagnoses.