Thelonious vs FretWizard

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.

FretWizard is the ultimate fretboard visualization tool for guitarists, bassists, and players of all stringed instruments. Whether you're a beginner learning your first scales or an experienced player deepening your music theory knowledge, FretWizard makes it easy to see exactly where every note lives on the neck. INSTRUMENTS Visualize scales and chords across 7 pre-defined instruments, or create your own custom instrument or tuning: • Guitar • Bass Guitar • Ukulele • Mandolin • 5-String Banjo (Open G) • 5-String Banjo (Double C) • Tenor Banjo • Custom — build any instrument with your own tuning (up to 12 strings) SCALES • Major & Minor • Pentatonic Major & Minor • Blues • Dorian, Phrygian, Lydian, Mixolydian • Harmonic Minor • Chromatic CHORDS • Major, Minor • Dom 7, Maj 7, Min 7 • Augmented, Diminished • Aug 7, Dim 7 • 6th, 9th, 11th, 13th • Sus2, Sus4 POWERFUL VIEW MODES Switch between four views to explore music theory your way: • Chromatic — see all 12 notes across the entire neck • Scale — highlight every note in your chosen scale • Chord — see all chord tones up and down the fretboard • Scale + Chord — overlay both at once to understand how chords live inside scales FLEXIBLE NOTE LABELS Choose how notes are labeled on the fretboard: • Note Name (C, D, F#...) • Scale Degree (1, 2, 3, 4...) • Interval (R, M3, P5...) MORE FEATURES • Sharp/flat toggle for your preferred notation • Pinch-to-zoom for detailed fret inspection • Landscape mode for a wider fretboard view • Full tablet support • Clean dark interface designed for readability on stage or in the studio