Chat Locker is an app that lets you secure your WhatsApp, Snapchat, Viber, WeChat, and Facebook messages with a simple 4-digit pin. It offers you a secure chat environment where you can send and receive text messages with no fear that anyone else will see them.

With Chat Locker, you can make all of your personal chats secure.

To do this, you need to first set a 4-digit pin. Once you have done that, you can use the app without having to enter your pin every time you use WhatsApp.

This is a very simple and easy-to-use application that will not take up much of your time.