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
The all-rounder, if you'll pay monthly
- Our Rating: 4.5 / 5.0
- Price: from $349 + $5.99/mo membership
- Battery (tested): 5–6 days
- Weight: 3.3–5.2 g
- Subscription: $5.99/mo
- Water resistance: 100 m
- Sizes: 4–15
- Finishes: Silver, Black, Gold, Stealth
Pros
- Sleep staging that lands within a few minutes of a clinical study
- The app actually tells you what to do with the data, not just charts
- Fully recessed sensors, so nothing digs into the next finger
- Four finishes that look like jewelry, not a gadget
Cons
- The $5.99/month paywall never goes away
- Battery is middle-of-the-pack next to RingConn
- Resizing means a new ring, not an adjustment
The membership fee still stings, and I won't pretend otherwise. You're renting access to your own body's data. But after six months on my finger, the Ring 4 is the one I keep recommending to people who ask once and don't want to think about it again. Sleep staging tracked within a few minutes of a take-home PSG on the nights I compared them, the readiness score has quietly talked me out of two workouts I'd have regretted, and the app translates numbers into plain-English nudges better than anything else here. Buy it if you want the best sleep tracking and the least friction. Skip it if a subscription is a dealbreaker; the RingConn Gen 2 gets you 80% of the way for zero recurring cost.
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.