Full guitar scale, interval, circle of fifths, Diatonic Chords, Neck Notes, and Metronome functions are available.
GTB Chords is the modern guitar reference app for guitarists who want to learn faster, play smarter, and understand the music they love.
Whether you're a beginner picking up your first chords or an intermediate player exploring jazz voicings, GTB Chords gives you a clean, distraction-free way to look things up — fast.
WHAT'S INSIDE
▸ Chord Library
Browse 45 chord qualities — from basic major and minor to seventh, ninth, eleventh, and thirteenth extensions. See up to 8 different voicing for every chord, from open position to the upper frets. Toggle between fingering numbers and note names to learn what you're playing.
▸ Scale Reference
Explore 6 essential scales — Major, Natural Minor, Major Pentatonic, Minor Pentatonic, Blues, and Harmonic Minor. See the formula, intervals, and notes in any key.
▸ Modes
Master all seven modes of the major scale — Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian. Understand the parent key, formula, and the unique character of each mode.
▸ Circle of 5ths
An interactive circle of fifths with major keys, relative minors, and key signatures. Tap any segment to see how keys relate to each other.
▸ Diatonic Chords
Pick a key, choose major or minor, and instantly see the seven chords that belong to that scale — perfect for songwriting and understanding chord progressions.
▸ Fretboard Explorer
Tap any note on a 15-fret guitar neck to highlight every position of that note across all six strings. The fastest way to learn the fretboard.
▸ Metronome
A simple, accurate metronome with adjustable BPM and time signatures. Practice with rhythm.
WHY GTB CHORDS
- Designed for clarity — no clutter, no upsells, no distractions.
- Works completely offline — no account required, no data collected.
- Native SwiftUI — fast, responsive, beautiful on any iPhone or iPad.
- Built by a guitarist, for guitarists.
PERFECT FOR
- Beginners learning their first chord shapes
- Intermediate players exploring extended harmony
- Songwriters figuring out chord progressions
- Teachers needing a clean reference for lessons
- Anyone who loves the guitar and music theory
GTB Chords is free to download and use, supported by occasional ads.
Questions or feedback? Email: cylcode@icloud.com
