Guitarist Buddy
Guitarist's music theory buddy
$1.99 · Designed for iPad. Not verified for macOS.
Your Guitar Music Theory Companion
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
* Added ukulele samples
* Added major blues and harmonic minor as scale types which can be displayed
* Common Progressions — a new Progression Builder view with common patterns like I-IV-V, I-V-vi-IV, 12-bar blues, ii-V-I, and minor variants. Similar in feel to the existing Chord Builder flow. A library of named progressions (I-IV-V, I-V-vi-IV, 12-bar blues, etc.) that auto-populate the Key Explorer's chord selection for the current key.
* Chord Transition Helper — tap two chords and get common fingering pivot points / suggested fingering paths between them.
* Capo Calculator — enter a Song Key and a preferred Play In key, get the capo fret plus a translated chord chart. A guitarist hears a song, finds out it's in Eb, doesn't want to play all barre chords — the capo tool tells them capo 1, play in D or capo 3, play in C. You'd show the original key, let them pick a target chord-shape key, and it outputs capo fret.
* modal characteristic notes and scale degree labels on the diatonic chord buttons.
* Reverse chord lookup - tap frets on a fretboard diagram and identify what chord it is chromatically, across all 12 roots and all qualities, with no dependency on any selected key.
* Improvements on Melody Builder - to include and suggest several guitar techniques to use as melodies, solo with in the context of the current key
The developer, DOUGLAS ANDRE DEVILLIER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DOUGLAS ANDRE DEVILLIER
- Size
- 6.6 MB
- Category
- Music
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - iPad
Requires iPadOS 26.5 or later. - Mac
Requires macOS 26.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 AD Apps
