Review · Health & fitness
Oura Ring 4 review
A titanium smart ring that tracks sleep, activity, readiness, stress and heart health, with 5 to 8 days of battery and an optional membership for full insights.
By the HearSmart research desk · Updated November 8, 2026
- Performance (40%)
- 9.0
- Ease of use (25%)
- 8.4
- Value (35%)
- 6.8
The Oura Ring 4 is the pick for people whose main goal is better sleep. Oura's Sleep Score draws on total sleep, heart rate variability, nighttime movement and sleep regularity, and the ring adds sleep stages, blood oxygen sensing at night and nighttime breathing analysis that flags possible disturbances. Bedtime guidance reminds you when to wind down. Around the clock it tracks heart rate, HRV and respiration with green and infrared LEDs, temperature trends with a digital sensor, and movement with an accelerometer, feeding readiness, activity and stress views. Oura says the titanium ring weighs 3.3 to 5.2 grams and lasts 5 to 8 days, depending on size and use, and it integrates with 40+ apps on iOS and Android. A finger ring is also easier to sleep in than a band for many people. The catch is the membership: Oura lists it at $5.99 per month or $69.99 per year for US members, which our value score reflects. We could not confirm the ring's US price from this location.
Who it is for
People who want the most detailed sleep tracking in a form that is easy to wear in bed.
Price
See vendor pricing (USD check pending).
US price check pending. See the vendor pricing page.
Key features
- Sleep Score, sleep stages and nighttime breathing analysis
- Blood oxygen sensing at night with red and infrared LEDs
- 24/7 heart rate, heart rate variability and respiration rate
- Temperature trends from a digital sensor
- Integrates with 40+ apps on iOS and Android
Strengths and weaknesses
- Strength: Fully titanium with recessed sensors for 24/7 wear
- Strength: Weighs 3.3 to 5.2 grams depending on size
- Strength: Works with iOS and Android
- Weakness: Full insights need an Oura Membership, listed at $5.99 per month for US members
- Weakness: Battery of 5 to 8 days depends on ring size and use
- Weakness: No screen, and you need the right ring size
Key facts
- Form: Titanium ring
- Battery: 5 to 8 days
- Weight: 3.3 to 5.2 grams
- Membership: $5.99 per month or $69.99 per year for US members
- Phones: iOS and Android
Where it ranks
Oura Ring 4 is No. 6 in our Best Fitness Trackers verdict and No. 2 in Best Sleep Trackers.
Alternatives we scored
Visit ouraring.com · Questions or corrections: editorial@hearsmart.org