Open Settings
Tap Screen Time
Tap Turn On Screen Time if it is not already enabled
Tap App Limits
Tap Add Limit
Select the app category or specific app
Tap Next
Set the time limit to 1 minute
Tap Add
Turn on Block at End of Limit
To block apps with downtime, tap Downtime in Screen Time
Turn on Downtime
Set the start and end times
Tap Always Allowed
Remove any apps you want blocked from the allowed list
To block apps with restrictions, tap Content & Privacy Restrictions
Turn on Content & Privacy Restrictions
Tap Allowed Apps
Turn off the apps you want to block
To block app installation, tap iTunes & App Store Purchases
Set Installing Apps to Don’t Allow
To block specific apps with a passcode, use Screen Time Passcode
To block apps using Guided Access, open Settings
Tap Accessibility
Tap Guided Access
Turn on Guided Access
Open the app you want to lock
Triple-click the Side button
Tap Start
To end Guided Access, triple-click the Side button and enter the passcode