Update watchOS

Check the watchOS version on your Apple Watch, in Settings | General | About. If lower than version 9, update to watchOS 9 for free in the Watch app on your iPhone.

Install apps on Apple Watch

Install watch face complications


If the watch app does not install, the following may be useful:

App Permission

Make sure to turn on read and write permissions for Tempori in the Settings App, in Health | Data Access & Devices.