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Our all-round ring pick

Oura Ring 5

Silver finish, whole sizes 6 to 13 chosen with the Ring 5 sizing kit, plus Oura Membership

$399US price, checked Oct 13, 2026

Compact titanium sleep ring that needs a paid membership

Check price at Oura Full review →

Smart ring

Samsung Galaxy Ring

Titanium Black, sizes 5 to 15 (Titanium Silver and Titanium Gold also listed)

$399.99US price, checked Oct 13, 2026

Titanium sleep ring with no listed subscription, for Samsung Galaxy phone owners

Check price at Samsung Full review →

Criterion	Oura Ring 5	Samsung Galaxy Ring
US price	$399Checked Oct 13, 2026 · Price details in the review	$399.99Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$608.97 Incomplete known subtotal. Not included: energy use.	$399.99 Incomplete known subtotal. Not included: energy use.
Choose if	You wear a whole ring size from 6 to 13, want sleep staging and readiness scores without a wrist device, and will keep paying for membership.	You have a Samsung Galaxy phone and want sleep, heart-rate and skin-temperature tracking from a ring, without a monthly membership.
Main trade-off	Without a membership the app shows only three daily scores, and Ring 5 stores three days of data, compared with seven on Ring 4.	Samsung says it needs a compatible Samsung phone, and the ring page gives no weight, warranty, return terms or accuracy figures.
Key specifications	Battery life: Up to 6 to 9 days, depending on ring size and usage. About 80 minutes to charge, depending on battery level Sensors: Red, green and infrared LEDs with 2 photodetectors, plus a temperature sensor and an accelerometer Membership: $5.99 a month or $69.99 a year (US, before tax). New members get the first month included, but adding a ring to an existing account doesn't add another free month Sizes: Whole sizes 6 to 13 only. The Ring 5 sizing kit is required, since Ring 4 sizing differs Water resistance: 100 m (328 ft), IP68. Oura says it's not for diving On-ring data storage: Up to 3 days (up to 7 days on Ring 4) Compatibility: iOS and Android, over Bluetooth 5.0	Battery life: Up to 7 days for sizes 12 and 13, and up to 6 days for smaller sizes. Samsung says that, 'combined with a full cradle charge,' you can use the ring for up to 14 days without plugging into an outlet. Battery life isn't stated for sizes 14 and 15 Sensors: Accelerometer, optical bio-signal sensor and skin temperature sensor Subscription: None listed on Samsung's Galaxy Ring page Compatibility: Samsung's US page says the ring requires a compatible Samsung phone, the Samsung Health app and a Samsung account. The account must be registered on a Samsung Galaxy smartphone. The page doesn't mention other Android phones, iPhone or a minimum software version. Energy Score needs a compatible Samsung Galaxy AI phone, and select Galaxy AI features need a compatible Samsung Galaxy phone. Snore detection needs Samsung Health 6.22 or later, with the phone within 2 feet Water resistance: 10ATM (up to 100 m for up to 10 minutes) and IP68 (up to 6 feet for up to 30 minutes). Samsung says to rinse and dry the ring after it gets wet Tracking features: Sleep score, sleep stages, snore detection, skin temperature during sleep, heart rate with high heart rate alerts, Energy Score, cycle tracking powered by Natural Cycles, steps, and automatic walking and running detection (you turn it on in Settings) Sizes and colors: Sizes 5 to 15 on the buy page, some shown as out of stock. The ring page says the range now includes two new sizes but doesn't name them. Titanium Black, Titanium Silver and Titanium Gold, with Gold shown as out of stock. The sizing kit's sample rings cover 9 sizes, from 5 to 13
Exact variant	Silver finish, whole sizes 6 to 13 chosen with the Ring 5 sizing kit, plus Oura Membership	Titanium Black, sizes 5 to 15 (Titanium Silver and Titanium Gold also listed)
Dimensions	6.09 mm wide and 2.28 mm thick, with a 0.7 mm sensor dome. Weight starts at 2 g, depending on ring size.	Not stated by the manufacturer. The Galaxy Ring page describes an 'elegant, lightweight design' but gives no weight, width or thickness.
Installation	No installation. Choose your size with the Ring 5 sizing kit, wearing it for at least 24 hours first. Oura says the index finger gives the best accuracy. Then pair the ring with the Oura App on iOS or Android.	No installation. Samsung says you need a compatible Samsung phone, the Samsung Health app and a Samsung account. Health data is stored in the Samsung Cloud connected to your account. The ring charges in the Galaxy Ring Charging Case, which has a clear cover and LED lights that show charging progress. The pages checked didn't list what's in the box. The buy page offers a free sizing kit, and the ring page says its sample rings come in 9 sizes, from 5 to 13. The kit ships to your home. You wear a sample ring for at least 24 hours, then confirm your size on the 'My Order' page.
Materials	The inner and outer surfaces are titanium, and the inside has no seams. Oura says every finish has a super-hard PVD coating for scratch resistance. This review covers the Silver finish.	Titanium, in three scratch-resistant finishes. Samsung says the concave design minimizes scratches. It describes Titanium Black and Titanium Silver as 'matted'.
Warranty	A 1-year protection plan comes with the ring. The Silver product page offers upgrades to 2 years for $45 or 3 years for $60. The product page doesn't say what the plan covers, such as battery wear, scratches or loss. Oura's return FAQ says warranty replacements can't be returned or refunded.	Not stated by the manufacturer on the Galaxy Ring page. The page links to Samsung's general 'Warranty Information' page without giving terms.
Returns	Oura's general Return & Exchange FAQs let you return an order within 30 days of receiving it. Items must be fully functional and undamaged. A ring set has to come back with the ring, charger and USB-C cable. Each item can be returned or exchanged once, and ring exchanges are only for a different size of the same ring. Refunds go to the original payment method, but original shipping, handling and customs fees aren't refunded. Rings bought from other retailers go back through that retailer. Oura says to cancel the membership in the app or Membership Hub when you return a ring, so the charges don't continue.	Not stated by the manufacturer on the Galaxy Ring page. The page links to Samsung's general 'Returns' page in its footer without giving terms.
Unresolved questions	What the included 1-year protection plan covers, such as battery wear, scratches or loss The Charging Case's price Whether the two-photodetector design changes heart-rate or sleep-staging accuracy compared with Ring 4 How accurate the ring itself is: the studies behind Oura's accuracy figures were published in 2020 and 2021, before Ring 5 Battery lifespan and replacement options The charger's power draw	Whether your size and color checks out at $299.99 or $399.99 Whether $299.99 is a temporary discount Weight, band width and thickness Warranty length and return window: the ring page links to Samsung's general warranty and returns pages without stating terms Battery life for sizes 14 and 15 Whether a sizing kit is offered for sizes 14 and 15 How accurate Galaxy Ring is against polysomnography or ECG, since no independent, peer-reviewed data was reviewed for this review Battery lifespan, out-of-warranty repair cost and charger power draw Which Samsung phones and software versions count as compatible Whether other Android phones work: Samsung's US page mentions only Galaxy phones, and news reports found in a search suggest they may, though those reports weren't reviewed here Which feature Samsung's 'Must wear device for 7 nights during a 30 night period' footnote applies to How long Samsung will keep selling and supporting the ring (no Galaxy Ring 2 was listed on the page checked)

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.