The Oura Ring Generation 4 sets a new standard for wearable health tracking with unprecedented sleep analysis accuracy, continuous blood oxygen monitoring, and a new stress management score.

What's New

Gen 4 adds continuous SpO2 monitoring, electrodermal activity sensing for stress detection, and improved heart rate accuracy that now rivals medical-grade devices in independent testing.

Sleep Tracking

Oura's sleep staging accuracy reached 93% in a Stanford validation study — higher than any wrist-worn device. The Readiness Score reliably predicts athletic performance and illness onset.