Thelonious vs Fretboard Map

Thelonious is a music theory app designed to help you understand keys, chords, scales, and harmony through clear, visual layouts. Explore major keys, review scale notes, and study diatonic chords in a format built for both learning and quick reference. Thelonious connects theory to real playing with chord progressions, guitar mode charts, and CAGED system material. Use Thelonious to: • Explore major keys and their scale notes • Understand diatonic chords and key relationships • Learn relative minor and dominant chords • Study chord progressions and harmonic movement • View guitar modes and CAGED chord charts Whether you’re learning the fundamentals or deepening your understanding of harmony, Thelonious makes music theory easier to read, understand, and apply.

Fretboard Map helps beginning guitarists understand the fretboard visually. Explore the CAGED system, shell voicings, chord tones, and an interactive note map to move beyond open chords and the first three frets. Guided practice paths help you learn roots, octaves, CAGED shapes, and fretboard connections. Hear the notes you are learning with separate recorded acoustic and electric guitar sounds. Play a chord together or hear its tones one at a time as an arpeggio. The acoustic sound uses nylon-string guitar recordings; the electric sound uses pickup recordings with gentle amplifier processing. Both sounds are included for offline playback. Key features: - Diatonic chord diagrams across seven modes, with chord and arpeggio playback - All five CAGED shapes and shell voicings - Triads and major, minor, dominant, and half-diminished seventh chords - Switch between note names and scale degrees - Interactive note learning and guided daily practice - Acoustic and electric guitar playback for notes, chords, and arpeggios - Built-in tuner with 440 Hz, 432 Hz, and 430 Hz reference standards - Landscape layouts for iPhone and iPad - English and Simplified Chinese interfaces No account is required. Build your understanding of chord shapes, note locations, and connections across the guitar neck.