Fretboard: Origin — The Complete Fretboard Learning System Whether you're just learning your first chord shapes or you're a working musician who needs a professional-grade reference tool, Fretboard: Origin is built for you. Designed for guitarists, bass players, ukulele and mandolin players, and players of 30+ fretted instruments, Fretboard: Origin is the most comprehensive music education and reference app on the App Store. Interactive Fretboard Touch any note. Explore any pattern. Lock individual strings, toggle scale degree and note name overlays, and hear every selection in real time. Optimized for both portrait and landscape — at home on iPhone and built for iPad. Professional Tuner No more guessing. Fretboard: Origin uses the YIN pitch detection algorithm combined with FFT harmonic analysis to detect your fundamental pitch and up to four harmonics simultaneously — delivering accuracy well beyond standard tuner apps. Adjustable A4 reference (432Hz, 440Hz, and beyond), cents deviation display, confidence scoring, and automatic noise floor calibration. Chord Library Over 40 chord quality types — triads, sus, 6th, 7th, extended, altered, and even Italian, French, and German augmented sixth chords — across all four inversions. A beginner-friendly Cowboy chord filter, intelligent enharmonic spelling per chord quality, and a professional pre-built voicing library mean you'll always see the right voicings, correctly spelled. Scale & Mode Explorer Major, minor (natural, harmonic, melodic), pentatonic, blues, whole-tone, diminished, bebop, and more — visualized across six different systems including CAGED, Berklee, Bruno, Grimoire, Gallier, and All Notes. Switch between all 7 modes in parallel or relative mode with a tap. Ear Training & Spaced Repetition Build real ears. Interval and chord quality recognition exercises with immediate feedback, sprint-based sessions, and a spaced repetition algorithm that focuses your practice where it matters most. Track accuracy trends, problem areas, and streaks in the built-in analytics dashboard. Advanced Metronome Eight time signatures, per-beat accent control, and preset patterns including Even, Strong 2&4, Waltz, and Custom. Solid and responsive — the metronome you'll actually use. Build Mode Create and save your own custom patterns. Build chord voicings, tap directly on the fretboard, export fretboard diagrams to PDF, and generate comprehensive voicing databases in JSON format using the Full Enumeration Kernel Generator. Music Theory Module From the musical alphabet to voice leading and secondary dominants — a complete theory curriculum built into the app, organized by topic and written clearly for working musicians. 30+ Instruments Standard and 7-string guitar, baritone, bass (4/5/6-string), ukulele, mandolin, banjo, bouzouki, sitar, oud, kora, and many more — each with correct theory, tunings, and fretboard geometry. Fretboard: Origin. Learn it. Reference it. Play it.