Guitar Theory Studio

New: the Daily — ten quick questions, same puzzle for everyone, streaks to keep. And GTS Pro: personalized workouts, mastery tracking, guided timed practice.

Guitar Theory Studio turns your phone into an interactive fretboard, chord book, and personal theory trainer.

EVERY TOOL IS FREE. Explore any scale, key, or CAGED shape on the Fretboard Explorer. Build and hear progressions with smooth voice leading in the Chord & Progression Builder — with a library of 25 classic progressions, every chord numbered in both Nashville Number System notation and Roman numerals. Sweep arpeggios for every chord in a key. Drill three-notes-per-string and pentatonic positions with the metronome-driven Practice Loop — or start guided practice and it walks you through every position, timed, hands-free. No account needed.

THE DAILY. Ten quick questions a day — read the neck, know the key, trust your ear. Same puzzle for everyone, new one at midnight, and a streak that grows every day you show up. Miss a question and it teaches you the answer. Tap Test Me inside any tool for five questions about exactly what's on screen.

ASK. Type "show me D Dorian" or "a 12-bar blues in E" and the right tool opens, already set up. The AI only picks the tool and settings — every note is drawn by the same theory engine as the rest of the app, so the answer is always right.

GTS PRO — YOUR PERSONAL THEORY TRAINER. Personalized daily workouts built from what you miss. Mastery levels for every skill, revisited on schedule just before you'd forget. Full progress history with practice-time tracking. Unlimited Test Me, expanded Ask, unlimited saved presets.

Notes and chords are spelled the way the key is actually written — B flat in F major, not A sharp — so what you read here matches what you read anywhere else.

Terms of Use (EULA): https://guitartheorystudio.com/terms.html