How to lock app on mobile

How to lock apps for Android 10 and Android 9.0 Pie on a Mobile phone

Open the Security or Biometrics tab in the Settings app (Fingerprint, face, or password).

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Find the App lock by scrolling to the bottom of the Settings screen and tapping on it.

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To use App lock, you must set a private password. Then select Set Password.

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The password for the app you wish to lock must be entered and established. Please re-enter the password and validate it after that.

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If any security questions are prompted, answer any one of them and select the Done option.

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Choose the apps you want to apply your lock to prevent unauthorised use and click on the Lock button.

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Your device has now successfully installed the lock app.

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To know more about it check the article

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