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The app locking feature on iOS 13 was actually added by Apple in the previous predecessor version iOS 12 called Screen Time. In this iOS version, Apple has significantly improved the security of this feature. If you often lend your device to others and don't want to expose private photos, information, or data, then the Screen Time app locking feature on iOS 13 is perfect for you.
Guide to Setting Password for Apps on iPhone, iPad running iOS 13
How to lock apps on iOS 13 without Jailbreak
Step 1: Firstly, on your iPhone, iPad running iOS 13, access the Settings -> Choose Screen Time. On the next window, tap on Use Screen Time Passcode.
Step 2: Proceed to set up the installation password to lock apps on iOS 13. After setting up the password, select Add Limit.
Step 3: Choose the apps you want to lock. You can manually select apps or select all apps and categories to set passwords for all apps on the device. In the Time section, set the minimum time to 0 hours and 1 minute for added security.
Step 4: Congratulations! You have successfully installed a password to lock apps on iOS 13 without Jailbreak. Now, access one of the apps you have locked in the previous steps and select Ask for More Time.
After entering the password, you have two options: One more minute (request an additional minute) or Enter Screen Time Passcode (Enter the password displayed on the screen). Finally, enter the password once again to access the app.
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This article on Mytour.vn has guided you on how to lock apps on iOS 13 without Jailbreak. Additionally, you can refer to how to Downgrade iOS 13 if you need to use an older iOS version.
