Frettly - the comprehensive fretboard explorer

Frettly is a macOS application dedicated to enabling players of fretted instruments to visualise, experiment and explore scales, modes and chords in a document-like canvas.

Supporting Guitar, Bass Guitar, Mandolin, Banjo and Ukelele, each document you create can show multiple scales/chords/modes for the documents chosen instrument, and each instrument type supports multiple possible tunings.

Frettly is currently under active development. If you'd like to hear when it's ready — or are up for testing early builds — I’d be happy to hear from you:

Drop a line at: hello@frettly.app

Join the beta list Read about the idea

Built for: players who like to see the relationships between notes, intervals, and shapes laid out clearly.

A document based fretboard notebook

Frettly documents are made of panels, each displaying a given scale, chord or mode
Scroll up/down in the document or 'Jump to' a specific panel in a document
Frettly panels can be dragged within the document to re-arrange them
Fretboards can be horizontally scrolled
Fretboards can be zoomed in/out
Flip all the panels in a document from right to left handed
Modify a documents instrument/tuning and all panels update to show that instrument
Notes or intervals displayed can be selectively hidden
Easily flip between displaying notes or intervals
Toggle the display of either the notes or intervals
Click any note or interval to hear the notes singly or with sustain
Save different documents for different learnings, projects or tunings.

If you’re a fellow guitar theory tinkerer, your feedback on workflows and visualisation will be especially welcome.