If you wear your ring at night (recommended), you're privy to a wealth of sleep insights, including your sleep stages, sleep score and blood oxygen levels changes. You can even access sleep coaching ...
The Oura ring 4 is also lighter, at 3.3-5.2g (depending on size), compared with 4-6g. While both versions of the ring promise to deliver similar metrics and insights, the ring 4 features an ...