Fretboard Interval Trainer
Learn to find and play any interval on the fretboard.
Start QuizHow This Interval Trainer Works
This trainer teaches you to understand distances between notes on the guitar fretboard. You'll learn to count semitones, recognise interval names, and play them in any direction — a skill that unlocks chord construction, scale navigation, and improvisation.
There are four different exercise types inside this trainer:
- Identifier: you're shown two notes on the fretboard. You indicate the interval or semitone distance between them.
- Player: you get a starting note and an interval or semitone distance. You tap or play the correct second note on the fretboard.
- Collector: you get a root note and an interval, then find every instance of that interval on the fretboard. This ties everything together and builds your visual map of interval shapes.
- Visualisation: picture interval shapes in your mind and answer questions about them, strengthening your mental map of the fretboard.
The learning path combines all of these and gradually introduces new intervals. You'll start with simple fret counting on one string, then move to intervals across strings, both directions, and timed challenges.
Three ways to practice
There are three ways to use this trainer:
Why This Interval Trainer Is Different
This trainer goes beyond memorising shapes. It teaches you both the interval shapes AND the semitone distances behind them, so you actually understand why shapes are the way they are, including the G-B string exception that trips up most guitarists. The goal isn't to count frets forever; it's to build the kind of understanding where you know what you're looking at. Once you get that, every chord shape and scale pattern on the guitar starts to make sense.
It also approaches intervals from four different angles: identifying them, playing them, collecting every instance on the fretboard, and visualising shapes from memory. That combination builds real fretboard fluency, where intervals stop being abstract theory and become something you can see and use.
Why I built this trainer
Intervals are the building blocks of everything on the guitar: chords, scales, arpeggios, melodies. Trying to learn music theory without understanding intervals is like trying to read without knowing the alphabet. I built this trainer to make it fun and easy to learn how intervals work on the fretboard.
Frequently Asked Questions
Is this free?
You can start playing right away for free, no account needed. The first section of the learning path and custom practice are completely free. A Game Pass unlocks all levels and features.
What are intervals?
An interval is the distance between two notes, measured in semitones (frets). Each distance has a name like 'minor third' (3 semitones) or 'perfect fifth' (7 semitones). Knowing intervals helps you understand chords, scales, and how the fretboard is organised.
Do I need to know the note names first?
Not at all. This trainer teaches intervals as fretboard distances. You don't need to know any note names to get started. That said, learning note names alongside intervals is a great combination.
Does this work on my phone?
Yes. The trainer works on phones, tablets, and computers. The fretboard is realistically sized and fits on a phone in landscape mode.
Does the app record my playing?
No. The audio stays on your device and isn't recorded, saved or sent anywhere.