The RingConn Gen 2 is one of the thinnest and lightest smart rings available today. Subscription-free and compatible with iPhone and Android smartphones, it boasts an impressive range of sleep-tracking features, including sleep apnea detection, personalized AI-backed wellness tips, up to 12 days of battery life (or 150-plus days with an optional quick-charge case) and a lower starting price than the Oura Ring 4, the best smart ring we've tested.
The RingConn Gen 2 is one of the three recently launched subscription-free smart rings vying for the title of best Oura Ring alternative in 2025. The other two are the Circular Ring 2 and Luna Ring 2, both of which I checked out in person at CES 2025.
In addition, RingConn faces stiff competition from 2024's Samsung Galaxy Ring, my favorite smart ring for sleep tracking, and the Amazfit Helio Ring which at $199, is the best value smart ring you can buy today. Can the RingConn Gen 2's unique mix of features, specs and affordability help it beat out these peers? Read on.
RingConn Gen 2: Price and availability
The RingConn Gen 2 was announced in fall 2024 and recently became available on Amazon; you can also buy it directly through the RingConn site. With a starting price of $299, it's $50 cheaper than the Oura Ring 4 and Circular Ring 2, $100 cheaper than the Samsung Galaxy Ring, and the same cost as the Luna Ring 2.
Available in black, gold or silver, sizes range from six through 14. To ensure you end up with the best size possible, RingConn offers a free sizing kit with dummy rings. As a reminder, smart ring sizing doesn't align perfectly with traditional ring sizing.
RingConn is also selling a clamshell-style quick-charging case for the Gen 2 for an extra $39 which seems like a pretty solid deal considering it can reportedly recharge the ring 12-15 times before needing to seek out a wall outlet.
RingConn Gen 2: Key specs
| Starting price | $299 |
| Subscription? | No |
| Finishes | Black, Gold, Silver |
| Sizes | 6 - 14 |
| Battery life rating | 10 - 12 days |
| Water resistance | 100 meters |
| Holistic sensors | Heart rate, blood ox, skin temp, accelerometer |
| Weight | 2 - 3 g |
| Material | Titanium alloy |
RingConn Gen 2: Design
RingConn says that the Gen 2 is the "thinnest and lightest" smart ring in the world. While I can't verify that fact with 100% certainty, I can tell you that it is noticeably thinner and lighter than most of the smart rings I've tested lately, including the Oura Ring 4 and Amazfit Helio Ring.
While weight varies depending on your size, the RingConn Gen 2 weighs somewhere between 2 and 3 grams with a thickness of just 2mm. The next-closest easy-wearing smart ring to it is likely the Ultrahuman Ring Air, which clocks in at between 2.4 and 3.6 grams depending on size, with a thickness of 2.4 to 2.8mm.
A full gram lighter than its predecessor and 1mm thinner, the RingConn Gen 2 is indeed comfortable to wear. While the outside is a perfect circle, the inside has a flat portion where the sensors are. This makes it surprisingly easy to keep the ring correctly oriented without looking; the sensors face the inside of your finger.
The exterior is titanium alloy with a PVD coating for scratch resistance while the inside is medical-grade epoxy. Two of the sensors along the inside protrude slightly but not uncomfortably so.
Water resistance is 100 meters and the RingConn Gen 2 is IP68-rated against dirt, dust, moisture and grime. Overall, the device feels well-constructed and built to last but more wear-testing is needed to verify my initial impression.
RingConn Gen 2: Features
The biggest feature that sets the RingConn Gen 2 apart from the other major (and minor) smart ring players is sleep apnea detection. It also monitors everything from your heart rate and respiratory rate to body temperature and blood oxygen saturation.
Sleep data is accompanied by digestible summaries with details into things like sleep cycles and stages, movement and time spent asleep, along with a daily sleep score out of 100 similar to what other wearables offer. You also get personalized, AI-powered tips to improve sleep and overall well-being.
According to RingConn, the heart rate and SpO2 sensors work with 98% accuracy. Similarly, respiratory tracking should be accurate within one breath per minute, and step-count tracking should be about 95% accurate.
The RingConn Gen 2 tracks a relatively modest number of physical activities including running, cycling and yoga. In addition to monitoring daily movement, it also keeps tabs on how long you've been sitting, offering (optional) periodic reminders to get up and move.
There are also stress tracking and management tools similar to what the competition offers along with menstrual health forecasting and nap detection.
RingConn Gen 2: Battery life
The RingConn Gen 2 is quoted as lasting between 10 and 12 days per charge, a claim I look forward to testing. By comparison, the Oura Ring 4 lasts up to eight days and the Samsung Galaxy Ring lasts for up to seven days. However, with the optional charging case, RingConn says that the smart ring can stay powered on for over 150 days, suggesting that users can expect it to provide 12-15 full recharges when fully juiced up.
By the way, the quick-charging case features an all-metal construction with a lid that snaps closed with satisfying force. To me, for less than $50, it seems well worth the cost if you're going all in on the ring.
RingConn Gen 2: Outlook
The RingConn Gen 2 potentially beats our favorite smart ring, the Oura Ring 4, in three key areas. These include the device's unique sleep apnea detection feature, a noticeably lighter/thinner design and the availability of a pocket-friendly quick charging case (something the industry leader still frustratingly lacks). It's also cheaper than the latest Oura Ring both upfront and in the long run (an Oura Ring subscription is $5.99 per month or $69.99 per year).
Of course, the RingConn Gen 2 isn't the only smart ring with a nifty quick charging case. The Luna Ring 2 will also be sold alongside an optional clamshell, which promises to extend its battery life from five to six days up to 30. That's not quite 150-plus but it's still impressive.
While the RingConn Gen 2 is one of the first smart rings with sleep apnea detection, the Circular Ring 2 is among the first with on-finger ECG readings and FDA-cleared AFib detection. It also boasts a potentially revolutionary new digital sizing process that could spell the end of wasteful dummy ring sizing kits forever.
With the RingConn Gen 2 and Luna Ring 2 in hands — and a Circular Ring 2 review unit promised — I should have a better sense of how this exciting new class of smart rings compares soon. Stay tuned for more content, including full reviews, on each.
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