They don’t even need server logs. You could opt being logged for support matters if you have problems. To log every user is not needed. It should be illegal. If

They don’t even need server logs. You could opt being logged for support matters if you have problems. To log every user is not needed. It should be illegal. If you need to log usage to improve or debug the app you could opt in users like beta testers. Final users shouldn’t be logged at all. Also you could make no-logging a paid feature