Tap Code

This is an app for practicing Tap Code, also known as Knock Code.

It uses a cipher device perfected by the ancient Greek historian and scholar Polybius, and also used by many prisoners of war to communicate.

It's a fun app to play with and learn how to tap code pretty quick and efficiently by having a visual reference of what is going on.

After you get used to the process, try tapping some words or sentences without looking and then see how well you did!