Learn the intervals on the guitar and bass fretboard by sound and by shape. Each question plays two notes and shows you where they are played on the fretboard. Name the interval and the next one starts. Score as many as you can before the round ends.
The levels
The levels follow the same order as the book Music Theory and The Fretboard.
- Level 1The Perfect intervals (unison, 4th, 5th, octave) and the Diminished 5th
- Level 2Adds Major and minor 3rds
- Level 3Adds Major and minor 6ths
- Level 4Adds Major and minor 2nds and 7ths
- Levels 5–8The same four steps across all six guitar strings
Levels 1 to 4 stay on the four low strings, which guitar and bass share, so every shape works on both instruments. Levels 5 to 8 are for guitar. They bring in the B and high E strings, where the B string shifts the shapes by one fret.
How a round works
- Rounds are timed, from 30 seconds at Level 1 to 2 minutes at Level 8.
- A correct answer scores 25 points. Each wrong answer costs 10, so guessing doesn’t pay.
- Tap the fretboard to hear the two notes again.
- Use Sound Check to hear your instrument and set your volume before you start.
Personal bests and the leaderboard
All levels work offline, and your personal best for each level is saved on your phone. Sign in with Apple if you want your scores on the online leaderboard. The app does not ask for your name or email address.
Requirements
iPhone with iOS 15 or later.
Need help?
The support page answers common questions and has a contact address. The privacy policy explains what the app stores.
