The App Library

Where kids strike gold
in music theory.

Three apps, one subscription. Watch each one below, then unlock them all for $9.99 a month.

Live now

The full wheel — tap any key to hear it.

App 1 · Ages 6–12

The Circle of Fifths

An interactive, colour-coded Circle of Fifths that turns key signatures and chord relationships into something kids can see and hear. Tap any key to play it on piano and read off its scale, its key signature, its relative minor, and the chords that live inside it.

  • All 12 major keys and their relative minors
  • Every chord in the key, tappable and playable
  • Real notation on the staff, not just letters
Open the App → Subscribers & trials
Seven levels, one streak counter, real notation.

App 2 · Ages 6–12

Theory Flashcards 7 levels · Student → Maestro

Nine card groups that turn theory into a game — real notation, real audio, and a streak counter kids will not let drop. Seven levels carry them from Student to Maestro, and over 1.9 million card combinations mean it never plays the same twice. It lives right beside the wheel, so a child can look something up and immediately be quizzed on it.

  • Notes
  • Key Signatures
  • Name the Chord
  • Hear the Chord
  • Major / Minor
  • Intervals
  • Scale Degrees
  • Relative Minor
  • Mix — all eight shuffled

Seven levels, modeled on the graded method books: Level 1 starts on the five-finger C position, each level unlocks more card groups and deeper pools, and Level 7 — Maestro — opens all 12 key signatures. You pick the level; the app remembers it.

Open Theory Flashcards → Subscribers & trials
The little ones' app — big buttons, big rewards.

App 3 · Ages 4–7 · Included free

Rainbow Gold Quest

The bonus app for the youngest players. Kids walk a rainbow path toward the leprechaun's gold, earning coins for every key they name. Big, tap-friendly buttons and no reading required to get started.

  • See & Name — a key glows, tap its letter
  • Hear It — a note plays, name what you heard
  • Find It — a letter is called, find it on the keys
Open the Game → Subscribers & trials

One price. All three apps.

No per-app upsells and no ads. One subscription unlocks the Circle of Fifths, all nine Flash Card modes, and Rainbow Gold Quest — on every device in the house.

Save $20

Yearly

$99.99/year

Works out to $8.33 a month.

Start Yearly
  • The Circle of Fifths — the full interactive wheel
  • Theory Flashcards — nine card groups across seven levels, Student → Maestro
  • Rainbow Gold Quest — the kids' game, included free
  • Every app we ship next, at no extra cost

Got a 7-day trial code? Redeem it here.

Coming soon

The library grows every month, and your subscription covers all of it — no upgrade, no extra charge.

Note Naming Race

Timed drills that turn note reading into a race against the clock, building staff fluency at speed.

In Development

Rhythm Tap

A beat-matching game that teaches note values, time signatures, and steady tempo — the rhythmic foundation every musician needs.

In Development

Ear Training Studio

Longer-form interval, chord-quality, and pitch-matching sessions that pick up where Hear the Chord leaves off.

In Development

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