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Smart ring

RingConn Gen 2 Air

Galaxy Silver, sizes 6 to 14 (or 'Don't know my size' with the free sizing kit), charging dock included

$199US price, checked Oct 13, 2026

Subscription-free $199 smart ring with up to 10 days of battery

Check price at RingConn 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	RingConn Gen 2 Air	Samsung Galaxy Ring
US price	$199Checked Oct 13, 2026 · Price details in the review	$399.99Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$199 Incomplete known subtotal. Not included: energy use.	$399.99 Incomplete known subtotal. Not included: energy use.
Choose if	You want overnight sleep, HRV and temperature trends from a ring for under $200, with nothing more to pay each year.	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	It has no sleep apnea monitoring or charging case, and RingConn takes returns within 14 days only for a reason such as a defect or the wrong color.	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 10 days on a full charge, depending on ring size. Magnetic charging on the included wired dock takes about 90 minutes to full. Unlike the Gen 2, it comes with a dock, not a charging case Sensors and metrics: The page doesn't list sensor types. The FAQ says the ring continuously monitors heart rate, SpO2, body temperature, sleep, steps and exercise calories. Its comparison table shows 24/7 HRV and skin temperature too. The page also covers sleep stages, workouts, a Stress Score and cycle predictions. The FAQ says it doesn't include sleep apnea monitoring Subscription: None. The page's comparison table lists the Gen 2 Air subscription fee as 'Free' FDA clearance: None claimed. The product page makes no FDA claim and doesn't say whether the ring is a medical device Sizes and weight: Sizes 6 to 14, plus 'Don't know my size' with a free sizing kit. 6.8 mm wide, 2 mm thick, 2.5 to 4 g. RingConn says Gen 2 and Gen 2 Air share the same sizes and sizing kit Water resistance and operating range: IP68, to 100 m (328 ft). Working temperature 32°F to 104°F (0°C to 40°C) Data and compatibility: Stores 5 to 7 days of data offline. The ring uses Bluetooth 5.0. It works with iOS 17.0 or later and Android 10.0 or later, on phones with Bluetooth 4.0 or above. The FAQ says data transmission, storage and analysis are encrypted and processed on AWS servers in the UK US import status: Not barred. An August 2025 US International Trade Commission (ITC) order barred imports of RingConn rings that infringe an Oura patent. RingConn then settled with Oura and licensed the patent, so in December 2025 the ITC removed RingConn from the order	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	Galaxy Silver, sizes 6 to 14 (or 'Don't know my size' with the free sizing kit), charging dock included	Titanium Black, sizes 5 to 15 (Titanium Silver and Titanium Gold also listed)
Dimensions	6.8 mm wide and 2 mm thick, weighing 2.5 to 4 g depending on ring size. RingConn's page doesn't give the inner diameter of each 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. If you don't know your size, choose the free sizing kit ('Don't know my size') when you order. RingConn says it sends the kit before the ring ships, and that it arrives in 3 to 8 days, depending on location. It suggests wearing the sizing ring for at least 24 hours, including overnight, then submitting your size under 'My Orders'. If you're between sizes, it recommends the smaller one or sending RingConn photos and videos. The ring works with iOS 17.0 or later and Android 10.0 or later. Each account pairs with one ring at a time. In the box are the ring, a charging dock, a Type-C cable, and an instruction manual and quick start guide.	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	Titanium steel with a PVD coating and medical-grade epoxy resin. The FAQ contrasts this with the titanium used for the Gen 2.	Titanium, in three scratch-resistant finishes. Samsung says the concave design minimizes scratches. It describes Titanium Black and Titanium Silver as 'matted'.
Warranty	RingConn's Return & Refund Policy gives one year from delivery outside the EEA, which includes the US, and two years in EEA countries. It will repair, replace or refund if a defect in its workmanship causes the damage. Claims go to RingConn with proof of purchase. The warranty excludes improper or negligent use, maintenance contrary to instructions, normal wear and tear and accidental damage. The policy calls rechargeable batteries consumables with a limited lifespan and leaves battery replacement out of the standard warranty. The warranty transfers to later owners. The Gen 2 Air page itself carries no warranty text.	Not stated by the manufacturer on the Galaxy Ring page. The page links to Samsung's general 'Warranty Information' page without giving terms.
Returns	Only rings bought directly from RingConn.com qualify. You have to request a return within 14 calendar days of delivery, and you need a valid reason. The policy lists a defect or damage on delivery, a color that doesn't match your order, or a product that differs significantly from its description. The ring must be in its original condition, unopened and unused. Once a return is approved, you have 14 days to send it back. You pay return shipping, and shipping, handling and tax aren't refunded. The exception is a defect, damage or non-conformity you reported with photos in advance. No restocking fee is stated, but RingConn may deduct for damage, wear or missing parts. Refunds go to the original payment method within 30 calendar days of RingConn receiving the ring or proof of return, whichever comes first. Sizing kits can't be returned, and canceling after the kit ships costs $10. For a different size or color, the policy recommends returning the ring and placing a new order.	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	Which sensors the ring uses, since the page doesn't list them Independent, peer-reviewed accuracy data for Gen 2 Air against polysomnography, ECG or pulse oximetry Whether RingConn counts a poor fit as a valid reason for a return or exchange Shipping cost, which the Gen 2 Air page doesn't state Battery lifespan, out-of-warranty repair or battery cost, and the dock's power draw Whether RingConn regards Gen 2 Air as a medical device, since the product page doesn't say How long RingConn will keep the app's features free and keep supporting Gen 2 Air	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.