
Guitarist Buddy
Guitarist's music theory buddy
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$1.99
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About
Guitarist Buddy is a music theory reference and practice tool built for guitar and ukulele players.
Select any of 30 major and minor keys — including all enharmonic pairs — and instantly see the notes in the key, the 7 diatonic chords, and a fretboard diagram showing exactly where to play them.
Key Features:
• Circle of fifths with all 30 keys — tap any segment to select
• Diatonic chords with chord quality labels and Roman numeral analysis
• Chord enhancements — Major 7, Minor 7, Dominant 7, Sus chords, Diminished, Augmented and more
• Fretboard showing all chord tones and scale notes in position, tap fretboard dots to hear individual guitar notes and try out different phrases in the app
• 7 modes — Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian
* Chord Builder page - provides several chord options and inversions per diatonic chord, including all CAGED shapes. Even with a capo.
• Setup page, including
- Support for a 6-string guitar and 4-string ukulele in Setup page.
- Uses actual guitar and ukulele string samples for playback
- Custom tuning support per string
- Lefty mode to flip the fretboard diagrams for lefty players
• Native IOS GUI with Full dark mode support
• Support for pentatonic, blues, and harmonic minor scales on the fretboard
• Consistent nomenclature for the degrees shown on each of the scale notes for a chord being displayed. Root of selected chord is always 1, regardless of its degree in the Diatonic Scale.
* Capo Calculator to support simpler key changes
* Reverse chord lookup
* Simple Chord Progression builder to help you see how to transition between two chords
* Melody Builder to work on and get suggestions for solo concepts in chosen key
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What's New in Guitarist Buddy
2.5
November 2, 2026
New in 2.5 - Modes can now be seen as relative to the original root and (new) as part of a parallel progression. For example, select C, then minor. From the original “relative” mode, you get Am, the natural minor of C major. In parallel mode (now the default), you will get Cm. This may later be used to implement borrowed chords from other keys.
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