Go to ManageBac and fill in the questionnaire. You can find average screen time per app (if you don't have this option or you can give a good estimate, please do that!)
- Android: Settings > Digital Wellbeing and parental controls > Dashboard (click the Numbers next to Apps) > Click the app > Click weekly (go back one week to find your average screen time from last week)
- Iphone: Settings > Screen Timer > Show all activity > Click app to find the average