RingConn Gen 2 vs Oura Ring 4

The RingConn Gen 2 delivers the fullest feature set, the longest battery, and no ongoing fee at the lowest price, making it the smartest default for most people. The Oura Ring 4 is the runner-up and the accuracy champion, but only worth it if you accept its permanent membership.

RingConn Gen 2

Buy it

The subscription-free ring that undercuts everyone while adding sleep-apnea screening and the longest battery in the class.

• No subscription: every feature, including sleep-apnea monitoring, is unlocked permanently at purchase
• Class-leading battery, with owners reporting roughly seven to ten days per charge plus a case that extends total runtime dramatically
• Very light and thin titanium build that owners find comfortable for overnight wear

• Sleep-apnea screening is a manual multi-night cycle rather than an always-on feature, and it drains the battery faster
• The app and coaching layer feel less polished and less mature than the category leader's

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Oura Ring 4

Buy it

The most refined sleep tracking and app experience in the category, if you accept a permanent monthly membership.

• Independent testing consistently rates its sleep-stage and resting-heart-rate trends among the most accurate of any ring
• The most mature app, with readiness, temperature-trend, and coaching insights built on years of algorithm refinement
• Works fully across both iOS and Android, with battery up to about eight days

• A mandatory membership is required to see almost any insight beyond basic sleep and wake times, so the true cost keeps climbing after purchase
• Premium finishes push the hardware price into the top of the range

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Side by side

The bottom line

Our overall pick is the RingConn Gen 2 - The subscription-free ring that undercuts everyone while adding sleep-apnea screening and the longest battery in the class. Choose the Oura Ring 4 instead if people who prioritize the best sleep and recovery data and do not mind paying a recurring fee for it.

Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Smart Rings: 4 Compared (and One to Skip).