How to Lock iPhone / iPad Apps with Face ID or Passcode
A handy app-specific security feature is available for iPhone and iPad that requires authentication with Face ID or a passcode before a chosen app can be launched. Essentially this lets you lock any iPhone or iPad app with Face ID or a passcode, and this lock applies even if your iPhone or iPad is already unlocked in general. Features like this are quite popular with security and privacy advocates, but are also useful for the average iPhone and iPad user too for many different scenarios.
The app lock feature works with both Face ID and with a Passcode, so whichever authentication method you use on iPhone or iPad you will find this available. If you are not familiar with how this feature works, read along and you’ll quickly find out how simple it is to enable and lock apps on your device.