A free program for Android, by ArK.
Lock Individual Chats - WhatLock is a handy tool for Android devices that lets you lock selected WhatsApp conversations with a password. This is an excellent tool for those who want to keep their conversations with their contacts a secret.
The app has a simple and intuitive design, so even if you have no prior knowledge of programming, you will not have any problems using it. The app can be easily downloaded on Android devices, and it will work with most Android phones.
The app has been designed to work with WhatsApp, so it is compatible with all versions of the popular messaging app.
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