The Oura Ring 4 starts at $349, but the real price isn't in the ring—it's in the $5.99-a-month membership. Without it, the app shows only basic data; readiness scores, detailed sleep staging, and heart-rate variability trends—the core features—are all locked. The verdict first: worth buying if you seriously track sleep and recovery and can live with a monthly fee; if you hate subscriptions, don't touch it even on sale.
The Strengths Are Real
The ring itself is titanium, 3.3 to 5.2 grams, with sensors set into the inner face—barely noticeable while sleeping. Battery life is 5 to 7 days in real-world reports, against an official 8-day claim. The strength is the algorithm: sleep staging and heart-rate variability have been repeatedly validated in independent testing as the closest consumer device to polysomnography (the lab gold standard), with sleep-stage agreement around 60%. Sizes run from US 4 to US 15, and the women's health features are fairly complete.
Work Out the Barriers and Costs First
Membership is $5.99 a month, or $69.99 a year, with the first month free. That puts the first-year total at about $415; over three years, ring plus membership comes to roughly $650, while the one-time-purchase RingConn Gen 2 costs just $239 and lasts even longer per charge (10 to 12 days). Two more points: there's no continuous SpO2 or all-day heart rate, so it's not a primary fitness recorder; and however accurate the data, it's not a medical diagnosis—there's no FDA or MHRA clinical clearance.
There's also a timing point: the Oura Ring 5 already launched in June 2026, from $399, slimmer with redesigned sensors, and the Ring 4 is often discounted. If you see a big discount on the Ring 4, add the membership before comparing prices—don't just look at the ring's sticker price.
Buy, or Don't Buy
Buy if all three apply: sleep and recovery are data you check every day; you're willing to pay monthly for the algorithm; and you already wear a watch on your wrist and don't want a second watch for sleep. Don't buy if any one applies: the very sight of a monthly fee annoys you (look at the Ultrahuman Ring Air or RingConn Gen 2 instead—both subscription-free); you mainly want to log workouts; or you want medical-grade data. Whether smart rings as a category are worth the money is covered in Are smart rings a waste of money? Three types of people genuinely benefit, two just pay for nothing; the watch-route comparison is in Is the Apple Watch Series 12 worth buying? Blood pressure alerts are not blood pressure measurement.
