Caesar Cipher

This was my first released native Android app. It lets users encrypt and decrypt text with the simple and widely known Caesar cipher.

If you have Caesar-encrypted text with an unknown key, the app can try to decrypt it for you. That can be useful for riddles, geocaching, and other puzzle contexts.

The algorithm is visualized with an interactive cipher disk. The disk can be exported and printed, making it possible to craft a physical paper cipher disk.