A free app for Android, by Benoit V..
If you are looking for a tool that can help you decode all kinds of encrypted messages, this app can help you out. Decrypto is an open source tool for the decoding of all kinds of encrypted message. It provides the user with a simple interface that allows them to choose from over 25 different ciphers. It also has a frequency analysis tool to help the user understand what the encrypted message is about. This tool shows the letter-by-letter frequency of each character in the text.
