Open the phone’s Settings app
Check Battery usage or Battery health
Look for Screen time or Digital Wellbeing
On iPhone, go to Settings > Screen Time
On Android, go to Settings > Digital Wellbeing and parental controls
Check the Device care or Device maintenance section
Use the phone’s built-in usage statistics if available
Check app usage time in the settings
Use a third-party screen time app if needed
Check call logs and activity history for phone usage time