RingConn sells the Gen 2 Air alongside the more expensive Gen 2 ($299), which offers a few upgrades, most notably sleep apnea ...

I’ve always preferred to wear my Oura ring on my ring finger. The company says that “for optimal performance and accuracy,” ...

To do this, you measure the circumference of your head. You take that number and divide by Pi, or 3.14. If you change the decimal to a fraction, that will be your hat size. For my head ...