In the Watch app, press the digital crown to go to the home screen, or the app enters the background state and tries to save the current data to iCloud.
However, in this case, you may not be able to save to iCloud.
In my opinion, the Watch app doesn't seem to be given any extra time to finish tasks once it enters the background.
Is there any way I can do a little bit of extra background work to get things done?
In the case of a background session, the system starts the app at an unspecified time after the app enters the background, so I decided that it was not particularly necessary in my case.
It would be nice to be able to finish the work within 30 minutes while entering the background state, but I can't find a suitable way.