A free program for Android, by Simlar.org.
Secure and private communication over the internet with Simlar. The app has been created with the purpose of offering the best, safest, and most private way to communicate over the Internet.
Simlar uses the end-to-end encryption protocol ZRTP. This ensures that the content of your message is only revealed to the recipient when you want to send it, and that nobody else can listen to your conversation.
When you first open the app, you need to create a code that the person you are talking to will use to verify your identity. This is a security measure to protect against man-in-the-middle attacks.