interesting idea
Type some text. Hit the magic button and it replaces your text with some random phrase. It seems you can delete all of the random phrase exept the first character without destroying the hidden message. It doesnt seem to care if you add text after. To me the random phrase gives away the secret message since they repeat and dont seem to fit the conversation. It might be better if you could choose or make the random phrase on the fly.
6r360ry about
Kibo - Hide your messages in any messenger, v1.3