Encipher

This is a secure messaging application you can send encrypted messages and decrypt the encrypted message that you receive. This app allows you to encrypt and decrypt the messages using two algorithms a simple and a not so simple algorithm you can choose which one to use and also have a secure messaging experience.Loads of feature yet to come so dont miss it!!
Check this out too:
TalkNote
https://play.google.com/store/apps/details?id=spoken.main