Because I was tired of transposing chords in my head for every song whose chords were written to be played with a capo. Also, I wanted to learn Javascript and how to make a Chrome extension.

Simple, and the quick-start guide (a capo with a quick-start guide!) includes a chart showing which size fretpad you need for your make of guitar. If your guitar isn't listed, Thalia offers a ...

Capo 3 can automatically detect chords and let's users create guitar tablature -- musical notes -- from songs in the iTunes library in order to help guitar players quickly learn songs.