Hidden Messages is a messaging app that allows users to send encrypted messages and receive private messages without leaving the app.
It allows users who have enabled the app to send and receive encrypted messages without their phone number, and it also encrypts the message when it is received.
While the app does allow users to use the app for encrypted messaging, it does not allow them to use it for the more common forms of encryption such as group messaging, group chats, and encrypted instant messages.
The app was designed to work with WhatsApp, and was created by Facebook for use in its messaging app, but it is not the only encrypted messaging app out there.
Other messaging apps include Signal, and Twilio.