The 9 best fitness apps 2026

Summary results for the percentage of SE for the devices versus polysomnography (PSG). The Samsung Galaxy Watch Ultra offers a comprehensive tracking experience that stacks up well against Oura and Whoop. There’s no sleep score here; Google instead summarises your sleep as ‘Restful’, ‘Fairly Restful’, or ‘Restless’. And, in some respects, we prefer it to […]