Oura Ring 4 Review: Six Months Later
Published: July 2, 2026
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Bottom Line
The Oura Ring 4 is the best sleep and recovery tracker we have worn, and after six months it is still on the same finger. It nails the thing a smart ring is for: telling you how you slept and how ready you are, without a screen buzzing on your wrist all day.
Two things keep it from being an automatic buy. Its readings only turn into insights through a $5.99 per month subscription, which adds up to more than the ring itself over a few years. And if you want workout guidance, pace, or maps, a ring cannot replace a good smartwatch; it complements one.
Half a year in, the battery still holds five to six days, the titanium shell has shrugged off gym bars and house keys, and the sleep data has stayed consistent with our reference gear. This is a product built for the long haul.
How We Tested
We bought the Oura Ring 4 at retail in January 2026 and wore it every day and night since: roughly 180 nights of sleep, plus workouts from easy runs to interval sessions. For accuracy checks we slept with a dedicated sleep-lab-validated tracker alongside it and compared morning reports, and we checked its heart-rate and temperature trends against a chest strap and a thermometer during illness.
Quick Specs
Oura Ring 4
Best Smart Ring for Sleep & Recovery
- Our Rating: 4.5 / 5.0
- Price: from $349 + $5.99/mo membership
- Battery (measured): 5 to 6 days
- Weight: 3.3 to 5.2 g by size
- Sizes: 4 to 15
- Water Resistance: 100 m
Pros
- Best-in-class sleep tracking
- Nothing on your wrist, nothing to charge nightly
- Five to six days of battery, still, after six months
- Titanium shell has survived gym and garden
- Temperature trends flagged an illness early
Cons
- Subscription required for nearly all insights
- No screen, no buttons, no workouts guidance
- Sizing kit adds a week before you can order
- Scratches show on polished finishes
Sleep Tracking Accuracy
Sleep is where the Oura Ring 4 earns its price. Across our comparison nights, its total sleep time and wake detection stayed within a few minutes of our reference tracker, and it caught short night wakings that wrist wearables slept through. Sleep-stage estimates should be read as trends rather than lab results, which is true of every consumer device we have tested.
The morning readiness score proved genuinely useful. On the mornings it told us to back off, our interval sessions confirmed it: legs heavy, heart rate slow to recover. After a few weeks we stopped arguing with it.
Battery Life
Oura claims up to eight days. In practice we saw five to six days with the default settings, dropping toward four when we used continuous heart rate during long workouts. More importantly for a long-term review: after six months of daily charging cycles we measured no meaningful degradation. The charging dock tops it up in under an hour, and we settled into charging it during showers, which means it effectively never leaves the finger.
Comfort & Durability
At around four grams the ring disappears within days. We slept, lifted, typed, and swam with it; the only time it came off was for deadlifts with a knurled bar, which is exactly what Oura recommends.
The titanium shell has held up better than expected. Our brushed-finish unit shows fine hairline scratches when you hunt for them under a lamp and no dents or coating loss. If scratches will bother you, skip the polished and gold finishes, which show wear sooner.
The Subscription Question
Without the $5.99 per month membership the ring shows you three bare scores and little else. Every insight that makes it worth wearing sits behind the subscription, so treat the real cost as $349 plus about $72 a year.
Is it worth it? If you will act on readiness and sleep data, yes: it is the best version of that data we have found. If you suspect you will glance at a score for two weeks and move on, the subscription math argues for a cheaper tracker or a smartwatch you already own.
Should You Buy the Oura Ring 4?
Buy it if you care most about sleep and recovery, you dislike wearing a watch to bed, and the subscription does not offend you. It is comfortable enough to forget, accurate enough to trust, and durable enough that six months in, ours looks and works almost like new.
Skip it if you want one device for everything. A ring gives you no screen, no notifications, and no in-workout feedback. For that, pair it with one of our favorite smartwatches or put the money there instead.
What Other Smart Rings Should You Consider?
We are testing the major alternatives head to head for our Best Smart Rings guide, including options without subscriptions. If the monthly fee is the dealbreaker for you, that guide covers the strongest subscription-free picks and how their data quality compares.