Smart Home & Wearables
Oura Ring 4 Review: The Sleep Tracker That Disappears On Your Finger
- Brand:
- Oura
- Ages:
- 13+ years
- Updated:
- 2026-07-02
The verdict
The Oura Ring 4 is the most comfortable and accurate pure sleep-and-recovery tracker you can buy, but the mandatory subscription and total lack of GPS or on-device training features mean it's a companion to a fitness routine, not a replacement for a real sports watch.
Pros
- All-titanium build with a flatter inner surface fixed most of the comfort complaints owners had about the 3rd-gen ring
- Real-world battery life of roughly 5-8 days is far longer than any smartwatch on this list
- Sleep staging and the daily Readiness score are consistently rated among the more accurate options in independent wearable comparisons
- No screen and no notifications, so it's worn passively without becoming another device pulling at your attention
- Free sizing kit before purchase reduces (but doesn't eliminate) the risk of ordering the wrong ring size
Cons
- A $5.99/month membership is required to see almost anything beyond the most basic data — the ring is really a subscription gateway
- No GPS and no on-ring workout screen, so it's a recovery/sleep tracker rather than a training tool for serious runners or cyclists
- Sizing can still be inconsistent finger-to-finger; some buyers report needing an exchange even after using the sizing kit
- 10ATM water resistance is fine for showering and swimming, but a lost ring is far easier to lose track of than a watch on a wrist strap
This review draws on Oura's published specifications for the 4th-generation ring, plus the consistent patterns across owner feedback and independent wearable-testing coverage since its release, weighed against the well-documented cost of the required Oura membership.
Comfort and battery are the real upgrades
The switch to an all-titanium, flatter-profile design is the biggest functional change from the 3rd-generation ring, and it shows up in daily wear comfort rather than any single headline spec. Battery life holding up around 5-8 days in real use, not just in marketing claims, is genuinely one of the ring's strongest selling points against any smartwatch.
The subscription is unavoidable
Buying the ring is only step one — Oura gates almost all meaningful insight (sleep stages, Readiness trends, cycle tracking) behind a $5.99/month membership. Budget for that ongoing cost before comparing the upfront price to a smartwatch that includes its software for free.
Who it's for
Best for people who care primarily about sleep quality and daily recovery and who find a screen-based watch too distracting to wear to bed. Skip it if you want GPS-tracked workouts, on-wrist notifications, or you're not willing to pay a recurring fee on top of the ring itself.
Frequently asked
- Do I have to pay a monthly subscription for Oura Ring 4?
- Yes. A $5.99/month Oura membership is required to unlock sleep staging, Readiness scores, and most other insights — without it, the ring shows only very limited data.
- Does the Oura Ring track workouts with GPS?
- No. The ring has no GPS or screen; it can log workout types after the fact and estimate heart rate, but it isn't a substitute for a running or cycling watch.
- How long does the battery actually last?
- Oura advertises up to 8 days, and real-world use typically lands around 5-8 days depending on how much you use blood-oxygen sensing and other features, with an 80-minute full recharge.
- Is the Oura Ring 4 worth buying?
- Yes, if sleep and recovery tracking are your priority and you're comfortable paying the ongoing membership fee. It's not worth buying if you want GPS workout tracking or a device that gives you insights without a subscription.
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