Fretboard Theory
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Built for guitarists

Music theory, left open next to your guitar.

See scales, find chord shapes, and build progressions. Keep it open next to your guitar and learn as you play. No lessons to finish or streaks to keep.

Try it freeGet the app
Join the community on Discord
Watch the demo

See it in action.

A quick look at how it works. Then try it yourself below.

Watch on YouTube → YouTube only loads when you click the preview.
Try it here

Ready when you are.

A progression is loaded. Click Use the app, then Play in the bottom-left. Change the key, try the chords, or let it loop while you play along.

Open in a new tab →
No account neededSettings saved in your browserSound made on your device
iPhoneView on the App Store → Fretboard Theory showing the C major scale map on iPhone iPadView on the App Store → Fretboard Theory progression library on iPad
Root
Scale note
Chord tone
12 scales
8 meters
1-12 strings
How it helps

Less guessing. More playing.

See how the notes and chords fit together, with your guitar in hand.

01 / NECK

See the whole scale

Choose a key, scale, and tuning. See the notes across the neck, with roots marked in coral.

02 / HAND

Find a chord shape

Pick a low, middle, or high position. As the chords change, the app finds shapes in the same area.

03 / MOVEMENT

Hear it together

Build a progression, choose the rhythm and meter, and add a metronome. Let it loop while you play.

BEST MATCH / 2 OF 3FRETS 3-6
A practical middle-neck chord fingering shown inside the active scale
Keep your idea

Try another key.

Your progression moves with you. Keep the chord forms, timing, selection, and neck position. No need to start over.

Standard and alternate tunings, seven- and eight-string guitar, bass, and ukulele. Or set up your own tuning.

App library

A place to start.

The installed app includes 28 progressions, from rock and roots to jazz, classical, and atmospheric guitar.

Not finished songs. Just ideas to try, change, and save as your own.

Get the appBrowse the library on the web. Install the app to open the samples.
WORKSPACES / BUILT INROCK FIRST
The progression library grouped by high-level guitar genre
Desktop Dry DI

Your amp. Your sound.

The desktop app makes a dry guitar signal, with no amp or cabinet added. On macOS, send it through BlackHole, then select BlackHole as your amp simulator's input.

  • No microphone needed
  • Dual mono on channels 1 and 2
  • Modeled strings, frets, picking, strumming, sustain, and palm muting
BlackHole is a separate download. The browser app makes sound locally with Web Audio instead.
01Fretboard TheoryDry DI
→
02BlackHoleVirtual cable
→
03Your amp simYour tone
Web app

Free in your browser.

Explore the neck, build progressions, and save your work locally. Includes custom tunings, time signatures, and a metronome.

Try it free
Installed app

Take it offline.

Get all 28 progressions and a dedicated app that works offline after installation. Desktop versions also support Dry DI routing where available.

Get the app
No app accountNo subscriptionNo ads or analyticsNo microphoneWorkspaces stay local
Give it a try

Grab your guitar.

Try it freeGet the app