Verified November 2, 2026

Oura Oura Ring 4

Oura Ring 4 is a titanium smart ring built around recessed sensors and Oura’s Smart Sensing platform for continuous sleep, recovery, activity, stress, temperature, and heart-health tracking. It suits buyers who want broad app-based health insights in a lightweight ring and are comfortable using an ongoing membership for the full experience.

Illustrative AI render of Oura Oura Ring 4

Product type: smart ring

Specifications and details

BrandOura
Model NameOura Ring 4
Platform SupportiOS and Android
Subscription RequiredYes
Claimed Battery Life8 days
Water Resistance Rating100m/328ft
Ring MaterialTitanium inner and outer surfaces; finish-dependent PVD or DLC coating
Sensor SetRed and infrared LEDs for blood oxygen; green and infrared PPG sensors for heart rate, HRV, and respiration; digital temperature sensor; accelerometer; Smart Sensing platform.
Sizing MethodOura Ring 4 sizing kit with sizes 4-15; wear a sizing ring for at least 24 hours, including sleep, before finalizing size.
List Price349 USD

Last verified: November 2, 2026

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