And we compare them to a smartwatch, the Oura Ring, and a smart bed to gauge sleep and health tracking accuracy. Other factors we consider are size ranges, sizing kits, app design, syncing times ...

After all, there’s no screen on a smart ring. The Ultrahuman app has the upper hand in design, with a sleek, modern, almost ...

Dubbed the ‘world’s thinnest smart ring’, the Circular Ring Slim lives up to these expectations with its lightweight and comfortable design. It uses a combination of sensors to measure and ...