For the greater part of this past summer, I wore six smart rings at once. 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.

"The Oura Ring 4 is available in six finishes: silver, black, brushed silver, stealth, gold and rose gold. But some finishes cost more than others. While silver and black are available at the $349 (£349, AU$569) starting price, brushed silver and stealth cost $399, and gold and rose gold are $499."

The Oura Ring 4 is a successful iterative update: it's a little better than the last one in a lot of ways. If you happen to have a Gen 3, you can probably skip it. If you're buying your first smart ring or still rocking a first- or second-generation Oura, though, the Oura Ring 4 is a great pick.