The developers of some applications, such as Telegram , give users the opportunity to put an additional level of protection in the form of a password to log into the application. However, this option is not available everywhere , and a standard screen lock will not help, for example, if someone wants to post your gallery on an unlocked device.
Use ApLpock to password protect individual Android apps . After installing and issuing all the necessary permissions, you can select the applications that will be protected with a password , pattern or fingerprint .
Please note that when you uninstall AppLock, all protected applications will be unlocked . To prevent an attacker from doing this, the application needs device administrator rights , and it would be appropriate to hide its icon.