Beyond the sleep score: What is a circadian score and which wearables offer it?

A collage showing screenshots of the Oura Ring app's Chronotype and Body Clock features and an image of the Oura Ring 4 on a woman's hand. .

My sleep score has always been the first metric I check when I wake up each morning, but that’s changing as wearables shift focus to a new rating: the circadian score.

Picture the scene: you got at least seven hours of sleep last night and your sleep score was high, but you're still exhausted. The issue might have nothing to do with your quality of sleep and everything to do with your internal body clock.