Piano Scales, Modes, Chords Downloads & RevenuePiano Scales, Modes, Chords · App Store

Look up any scale or mode, in any of the twelve keys, and actually hear it played on a keyboard you can tap.

Most theory apps hand you a static chart and leave you to imagine the sound. ScaleBook lights the scale up across a two-octave piano, spells every note with the correct sharps or flats, plays it back ascending or descending, and builds the diatonic chords that go with it — so the shape, the name and the sound land at the same time.

WHAT YOU GET
- 18 scales and modes across six families — major, minor, pentatonic, blues, the seven modes and exotic scales — in all 12 keys
- A two-octave piano keyboard that highlights the scale and sounds any note you tap
- One-tap playback of the whole scale, ascending or descending, with the notes lighting up in time
- Diatonic triads for every seven-note scale, with Roman numerals and tap-to-hear chords
- An interactive circle of fifths plus a 0–12 semitone interval table, so key signatures stop being guesswork
- An ear trainer that plays a mystery scale from a random root and tracks your streak, best run and rounds played

ALSO INSIDE
- Star any scale as a favourite, then filter the library down to just those
- Search the library by name or category, with quick category chips
- Three synth timbres — piano, electric and sine — plus an A4 reference pitch you can slide from 415 Hz to 466 Hz
- Four written theory reads: what a scale is, modes explained, reading key signatures, and pentatonic & blues
- An optional daily reminder at 19:00 to keep practice honest

PERFECT FOR
- Piano and keyboard players learning scales beyond major and natural minor
- Songwriters and improvisers hunting for the right mode or colour for a progression
- Jazz and blues players drilling Dorian, Mixolydian and both blues scales
- Music students revising intervals, key signatures and the circle of fifths
- Anyone training their ear to tell Dorian from natural minor by sound alone

WHY NOT JUST SEARCH IT ONLINE?
A search gives you a picture of C Lydian. It does not play it, it does not transpose it to E flat, it does not tell you which chords fit, and it does not work in a rehearsal room, on a train or anywhere the signal drops. ScaleBook runs fully offline — every scale and every tone is generated on your device, with no account and no ads. The interface is dark by design, so it sits easily on a music stand at night.

PRIVACY
No account, no sign-up, no tracking, no microphone. Your favourites, ear-trainer stats and tuning settings live only on your iPhone.

FULL ACCESS
Eleven of the eighteen scales are Pro, and diatonic chord building plus the ear trainer are Premium. One purchase unlocks the lot: melodic minor, Phrygian, Lydian, Mixolydian, Locrian, whole tone, diminished, Phrygian dominant, Hirajoshi, Hungarian minor and major blues, along with chords and ear training.

Three options, no free trial:
- Weekly (com.levi.scalebook.weekly) — renews every week
- Yearly (com.levi.scalebook.yearly) — renews every year; this is the optio