Review · Health & fitness
Oura Ring 5 review
Oura's newest ring, 40% smaller than the Oura Ring 4, with sleep, readiness and heart data and 6 to 9 days per charge.
By the HearSmart research desk · Updated November 9, 2026
- Performance (40%)
- 9.5
- Ease of use (25%)
- 9.2
- Value (35%)
- 7.6
Oura Ring 5 takes the sensor set of the Ring 4 and fits it into a ring Oura says is 40% smaller, at 6.09mm wide and 2.28mm thick. For sleep, it uses red and infrared LEDs for blood oxygen, green and infrared LEDs for heart rate, HRV and respiration rate, a temperature sensor and an accelerometer. The Oura App turns that into readiness, sleep and rest, stress and resilience, heart health and women's health views, and Oura says it tracks 50+ health metrics. Battery is rated at up to 6 to 9 days, the longest of any Oura ring, and a full charge takes about 80 minutes. The catch is cost: the US store price did not load in USD from our location, and the insights rely on Oura Membership, which Oura lists at $5.99 per month for US members. A quick-charging case is an extra purchase, and sizing differs from older Oura rings.
Who it is for
People who want the most complete sleep and recovery picture from a ring small enough to wear like jewelry, and accept a monthly membership.
Price
See vendor pricing (USD check pending).
US price check pending. See the vendor pricing page.
Key features
- Sleep and rest data, readiness, daytime stress and resilience in the Oura App
- Red and infrared LEDs for blood oxygen, green and infrared LEDs for heart rate, HRV and respiration rate
- Digital temperature sensor for temperature trends
- Up to 6 to 9 days of battery per charge, about 80 minutes to recharge
- Integrates with 100+ apps on iOS and Android
Strengths and weaknesses
- Strength: Oura's smallest ring: 6.09mm wide, 2.28mm thick and from 2 grams
- Strength: Longest battery of any Oura ring at up to 6 to 9 days
- Strength: An existing Oura Membership carries over when you add the ring
- Weakness: Full insights sit behind Oura Membership, listed at $5.99 per month for US members on Oura's Ring 4 page
- Weakness: The charging case that gives a full day in 10 minutes is sold separately
- Weakness: Sizing differs from other Oura models, so you need a new sizing kit
Key facts
- Battery: Up to 6 to 9 days
- Size: 6.09mm wide, 2.28mm thick, from 2g
- Water: Waterproof to 100m, IP68
- Apps: iOS and Android, 100+ integrations
- Membership: Oura Membership for full insights
Where it ranks
Oura Ring 5 is No. 1 in our Best Smart Rings verdict.
Alternatives we scored
Visit ouraring.com · Questions or corrections: editorial@hearsmart.org