App Inactivity Notice - so I know when I can make app updates

It would be really helpful sometimes to be able to set some sort of alert on an app, where the system would alert me when there’s been no activity in an app for X amount of time.

When I’ve got updates I need to make, and I don’t want to make those while people are using the app, I either have to:

  1. coordinate with everyone, scheduling a time to make the updates;
  2. make the updates regardless of user activity; or
  3. wait till there’s no activity on the app

If number 3 is my option, I have to constantly come back to the app and check on activity to see when the window opens up.

If there was a flag I could set, that would notify me when the app has been inactive for 1 hour (for example), then I could eliminate this.