AutoSleep 5

Wrist-based sleep tracking

- Tim Hardwick

Apple’s watch OS doesn’t offer a built-in sleep tracking feature. At first, there was a logical reason for this: battery life on the first Apple Watch rarely lasted beyond the advertised 18 hours, meaning the device had to be perched on a charging dock as you slept.

Fast forward to the Apple Watch Series 2 and 3 models, however, and many owners find their smartwatches can last two days or more on a single charge. Third-party developers have since stepped in to fill the Apple Watch’s nocturnal feature gap, with AutoSleep generally being the popular choice for several reasons.