Cristiano Ronaldo is engaged to long-term girlfriend Georgina Rodriguez after the latter made the news public by flaunting her diamond ring.

Worry not; that isn't any sign of danger. The red glowing light indicates that your smart ring is working perfectly fine and measuring your blood oxygen level (SpO₂).

I wanted to see which was best, and the Oura Ring Gen 3 was the clear winner. Well, it’s been about two weeks since my experiment ended, and there’s now a new winner: the Oura Ring 4.