Oura Ring introduces social sleep sharing feature.

Oura Ring, the smart sleep tracking ring, has added a new community feature called "Circles" that allows users to share readiness, sleep, and activity scores from the past two weeks with friends. Users can customize what data gets shared and choose whether other members see daily scores or weekly averages only. Oura has also moved its new sleep staging algorithm out of beta for both iOS and Android users, which achieves 79% agreement with gold-standard polysomnography for wake, light, deep, and REM sleep. However, the cost of the Oura Ring means it still has primarily affluent users, and it remains to be seen whether the community feature will take off.