Semitono: Learn Music Theory

Semitono teaches music the other way round: instead of tables to memorize, it shows you where everything comes from.

Why there are twelve notes and not some other number. Why a dominant chord pulls back home. Why the minor scale isn't a new scale at all, but the major one seen from somewhere else. Why a sung note falls flat at the end of a long phrase. Once you understand the mechanism there is nothing left to remember: you can work it out.

FOUR SPECIALITIES, ONE COURSE 80 lessons across thirteen phases, from the first sound to improvising and composing. Guitar, piano, singing and solfege each get their own block, on top of a shared trunk of theory, rhythm and ear training. Follow the course in order, or look at it by discipline and see how far along you are in each.

NOTHING IS JUST TEXT Every lesson mixes the explanation with something to listen to, a keyboard or a fretboard to try it on, and a question you can reason out before you see the answer.

A DIFFERENT PLAN EVERY DAY The app builds your session: warm-up, review, new lesson, ear, voice, rhythm and repertoire, scaled to the minutes you have. Review uses spaced repetition, so what you learn comes back just before you forget it.

SINGING, MEASURED The voice studio measures your range and your comfortable tessitura, tells you in cents how far off you sing, whether the note drops because you run out of breath, and whether you slide into notes instead of landing on them. With your range measured, it suggests the key each song should be sung in.

REAL TOOLS · Chromatic and per-string tuner, with cents and note stability · Metronome with subdivisions, accents and silent bars · Rhythm trainer that measures your deviation in milliseconds · Ear training: intervals, chord quality, scale degrees and progressions · Interactive piano and fretboard, scale and chord labs, circle of fifths · Sight reading with new bars every time · Recorder, repertoire with backing tracks and exercises with tempo goals

WORK SONGS OUT BY EAR Play music near the microphone and the app estimates the key and the chords, translated into scale degrees so you can play them in any key.

A TEACHER INSIDE THE DEVICE Ask anything. It runs on the language model Apple executes on the device itself: your questions never leave it. Every answer is grounded in the course's own lessons, with the passage that backs it shown underneath.

A BREAK WHEN YOU NEED ONE Twice a month you can take a break: the streak freezes, reviews are pushed back with you, and the daily reminder goes quiet. Coming back from a trip shouldn't cost you eighty overdue cards.

NO ACCOUNTS, NO TRACKING No sign-up, no ads, no analytics, no third-party components. Your progress stays on your device and, if you want it to, syncs through your own private iCloud.

WHAT'S FREE AND WHAT ISN'T Free: the full tuner and metronome, the first four phases of the course, the daily plan, the streak, breaks, spaced review, ear training, the voice studio, the piano, the fretboard, the widget and ten songs from the repertoire.

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