FABULUS answers the question every guitarist asks sooner or later: what's that chord? Download the FABULUS IPA for iPhone and tap two or more notes on the interactive fretboard to get the chord name and see the role of every note.

Beyond identifying chords by ear, FABULUS lets you browse a library of over 100,000 chords, reverse a chord to see how it's built, and create your own from scratch. It runs with no ads and no personal data collected, so every tool — identifier, decomposer, browser and creator — is available from the start.

Key features

Chord identifier from fretboard fingering
Library of 100,000+ chords to browse
Reverse chord lookup and decomposer
18 predefined tunings plus custom tunings
Capo and key transposer
Left-handed mode and chord playback

Get FABULUS on builds.io — download the IPA and install it on your iPhone in one tap, no PC.