I compared this subscription-free smart ring to my Oura and here's how it fared

The Ultrahuman Ring Air is a well-rounded sleep and activity tracker, offering features that go head-to-head with the Oura Ring.

I compared this subscription-free smart ring to my Oura and here's how it fared
The Ultrahuman Ring Air is a well-rounded sleep and activity tracker, offering features that go head-to-head with the Oura Ring.