A free program for Android, by Protect Company.
Secret AppLock is an Android app protector, which could protect your privacy. The app lock blocks the execution of the applications of others, so they will not be able to see your smartphone.
You can set up a pin code to keep your phone safe from unwanted users. You can also use the app lock for locking the following apps:
Contacts, SMS, Email, Gallery, Facebook, Twitter, Instagram, Messenger, LINE, and more.
Secret AppLock is very easy to use, and it has a very simple interface.
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