Apple Watch has a useful hidden feature for tracking a great healthy habit

9to5Mac — Jul 08, 13:00 PM

https://9to5mac.com/wp-content/uploads/sites/6/2025/09/apple-watch-ultra-3-hero.webp?w=1600" />

My new favorite Apple Watch and Apple Health metric is one that has been quietly working in the background for years.

Specifically, it’s a bit of a hidden Apple Watch feature for tracking a great healthy habit: Time in Daylight.