How to lock iPhone apps behind Face ID or passcode

To improve privacy, some third-party iOS apps offer an option to require additional authentication, such as a passcode or Face ID, even if the user has unlocked their iPhone. This extra verification step adds a layer of security to the app's content, but not all apps have the same functionality. This security measure helps prevent unauthorized access and protect the privacy of user data. Users can enable or disable this feature in the application settings based on personal preference. While the user experience may suffer slightly from this additional authentication, this additional security measure is critical for those users who are extremely concerned about privacy and data security. In today's era of digital information leaks, Apple has not provided a way to individually lock sensitive apps like Photos until recently, and iPhone users have had to resort to Screen Time app restrictions as a Solution. Luckily, that’s no longer the case, as you can now create an extra layer of security for any app on your iPhone using Shortcut Actions included in iOS 16.4 and later.

Apple has recently added more features to the Shortcuts app, and one notable feature is the lock screen. At its core, the Lock Screen feature lets you set up personalized automations to automatically lock your iPhone when specific apps are opened.
Of course, as an iPhone owner, this shouldn't cause access issues for you, but it does mean that anyone else trying to open the app will need to first authenticate with face or enter your password , even if your iPhone is unlocked when you tap the app icon.

The following steps will guide you through the process of setting up a personal automation that will instantly lock your iPhone when you open the app of your choice.

Launch the Shortcuts app and tap the Automation tab at the bottom of the screen.

Click the button in the upper right corner, then scroll down the options menu and select Apps.

1. On the next screen, tap Select to select an app from the app list, then tap Done.
2. Make sure Open and Run Now are selected, then tap Next.
4. Start typing "Lock Screen" in the text field and select Lock Screen when it appears in the following results.
   You should see the new automation "Lock screen when [app] is opened" has been added to the Automations list.
6. 
   #Your personal automation is now complete and should start automatically the next time you open the selected application.

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