Guitar Codex

Guitar Codex is the reference you'll reach for every time you pick up the guitar — a complete chord and scale library, practice tools, and a structured beginner course — with a promise most music apps have abandoned: pay once, own it forever. Never a subscription. THE CODEX • Chord library — every chord quality from open shapes to extended and altered voicings, with every position up the neck • Scale library — modes, pentatonics, and exotic scales, mapped across the whole fretboard • Triads — every quality on every string set, with inversions • Arpeggios — every quality, position by position • Circle of Fifths — interactive, all 12 keys, major and minor Every diagram uses the same interval color code — root, third, and fifth at a glance — with big, high-contrast markers designed to stay legible on a music stand. PRACTICE TOOLS — ALWAYS FREE • Chromatic tuner — fast and accurate, with a target mode that locks onto the string you're tuning • Metronome — tap tempo, time signatures, and a visual beat indicator LEARN — A REAL COURSE 140 lessons across 12 modules take you from holding a guitar for the first time through chords, strumming, barre chords, rhythm, chord progressions, scales, and improvising. All of Module 1 is free, including a lesson on reading guitar tab. FAIR PRICING, FOREVER • The tuner, metronome, and starter libraries are free — no time limits, no ads • Guitar Codex Pro unlocks the complete reference toolkit with a single one-time purchase • Guitar Codex Complete adds all 140 lessons — and every future lesson, forever • Already own Pro? Upgrade to Complete for the difference No ads. No account required. No subscriptions. Just a guitar codex.