Oura Ring 4: full spec sheet and buying guide
The Oura Ring 4 is one of the best-known smart rings: an all-titanium ring that tracks sleep, activity, stress and heart health without a screen. At the time of writing it holds a 4.0/5 average from more than 9,223 Amazon ratings.
Tracks 50+ health metrics, all-titanium design, up to 8 days of battery, works with iOS and Android and 40+ apps.
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Sizing and design
Oura uses its own ring sizes, which differ from standard jewelry sizes, so Oura recommends ordering the Oura Ring 4 Sizing Kit first. It's the first all-titanium Oura ring, water resistant and designed for 24/7 wear, with no screen and no vibrations.
Membership and battery
The first month of membership is included for new members; after that it's $5.99 per month, tied to your Oura account. Battery life is up to 8 days. It integrates with 40+ apps, including Apple Health and Google Health Connect, and the ring is HSA/FSA eligible.
Strengths based on its spec sheet
- Discreet titanium ring
- Tracks 50+ health metrics
- Up to 8 days of battery
- Works with iOS and Android
What to consider before buying
- $5.99/month membership after the first month
- You need the sizing kit before buying
- Lower 4.0 average rating
Want to compare this model with other wearables and health devices? Check out our wearables buying guide.
Who is it ideal for?
People who mainly care about sleep and recovery and prefer a ring over a watch.
Who is it NOT the best option for?
If you don't want a subscription, the RingConn Gen 2 Air has no monthly fee; see our wearables buying guide.
Frequently asked questions
Does the Oura Ring 4 need a subscription?
Yes for full features: the first month is included for new members, then $5.99/month.
How do I choose my size?
Use the Oura Ring 4 Sizing Kit; Oura sizes differ from regular ring sizes.
How long does the battery last?
Up to 8 days, according to Oura.
Is the Oura Ring 4 the right fit for you?
See current price on Amazon