Apple has released an update to the software that runs on the Apple Watch. Updating the Apple Watch must be done through the app on the iPhone; instructions for that are on this page to find. Version 7 of watchOS adds sleep tracking, among other things, and there is a ‘wind down’ option for the optimal time to go to bed, with Do Not Disturb mode going on. Since version 7.3, the following changes and improvements have been made:
This update provides important security updates and is recommended for all users.
watchOS 7.3.1 addresses an issue that prevented some Apple Watch Series 5 and Apple Watch SE devices from charging after entering Power Reserve.