String Theory app for iPhone and iPad

String Theory will help you to understand the guitar fretboard better than ever before. The colorful interface displays scales, modes, chords and arpeggios in a clear and easy to understand way.

Select a musical formula from the library, or enter your own pattern of notes, then instantly see and play them all over the guitar fretboard.

Whether you are just starting out with the guitar, learning your open chords, or you are an experienced guitarist looking for new ideas for chord voicings and scale fingerings, this is the app for you. Thousands of students and teachers of the guitar around the world use our apps to better understand their instruments.