● Coming soon

Learn to read music, one note at a time.

Reading sheet music isn't a gift — it's a skill built from short, repeated doses. Cléo cuts it into two-minute lessons you can do standing on a train, with no instrument and no gear.

Not on the App Store yet. This page will be updated at launch.

The path screen: streak, experience points and lives at the top, then the daily mission, training and the list of chapters.

What is Cléo?

Cléo is an iPhone app that teaches sheet music reading, in English and French. The course covers eight chapters, from the staff to key signatures, in two-minute lessons. It is entirely free; an optional subscription removes the ads. The app requires no account, no microphone, and no instrument.

In action

The course, screen by screen

Not mockups: the app exactly as it runs on an iPhone.

A theory card explaining the augmentation dot: a few sentences of text followed by the rule to remember.

It explains before it asks

  • Every idea opens with a theory card: where the rule comes from, what it's for, what to remember
  • Most apps drill rules; Cléo tells you where they come from, and a rule you understand doesn't need revising
  • Then the exercise arrives, on the sign just explained, one at a time
The training screen: a note on a treble staff, four names to choose from, and a difficulty gauge in the top right.

Training tunes itself to your level

  • One note, four answers: reading stays sharp through short repetition, not through practice sessions
  • Difficulty follows what you get right, without you having to pick it
  • Treble clef and bass clef, the daily mission, and the streak that carries from one day to the next
Why Cléo

We explain the why, not just the what

Why a notehead is hollow or filled, why a stem flips direction halfway up the staff, why a second clef exists at all. Here's what you'll be able to do by the end of the eight chapters.

Read any note

The five lines, the four spaces, and everything that spills past the staff — in treble clef and bass clef alike.

Read durations

Whole, half, quarter and eighth notes, dots and ties. Position tells you the pitch, shape tells you the time.

Understand rests

Whole, half, quarter and eighth rests — and why silence gets written down instead of left blank.

Decode a bar

Bar lines, time signatures and what those two numbers actually mean, on examples you can count through.

Accidentals and key signatures

Sharps, flats, naturals, and the key signature at the start of the staff that settles the whole piece at once.

The why behind each rule

Not just the rule: the reason for it. That's the difference between revising something and remembering it.

A full course, from your first landmark to key signatures. From “these five lines mean nothing to me” to reading a score, chapter after chapter.
Preview

What it looks like

Three more screens, untouched.

An exercise: the augmentation dot alone in a frame, with three definitions to choose from.
Know the signs, one at a time.
The progress screen: experience points, day streak and completed modules, a chart for the week, then the list of modules with their percentage.
Progress, module by module.
The path screen: streak, experience points and lives at the top, then the daily mission, training and the list of chapters.
The path, with the daily mission.
How it works

Open, learn, come back

No account, no server: everything happens on your iPhone.

1

Start from scratch — or don't

The first chapter starts at the five lines of the staff. If you already read music, a placement test opens the chapter where it stops being obvious.

2

Two minutes of lesson

The rule gets explained, then you get asked about it. Enough to fit the wait on a station platform rather than a practice session.

3

Keep what you know

The daily mission, the streak and adaptive-difficulty training keep your reading fresh between chapters.

Pricing

The whole course is free

All eight chapters, all 37 lessons and every exercise, with no exceptions. The subscription unlocks no content: it removes the ads and the lives.

Free
€0

The complete course, no exceptions. Limited lives, an ad now and then, and an optional video to earn a life back.

Subscriptions are managed and cancelled from your Apple account settings. Nothing is sent to a server: your progress stays on your phone.

Download

The iPhone app

Cléo is distributed exclusively on the App Store: nothing to install by hand, no permission to grant in your settings.

Not available yet

This page will be updated as soon as it ships on the App Store.

Download on the App Store
  • iPhone, iOS 18.0 or later
  • English and French, picked from your phone's language
  • No account, no sign-up, no connection needed to learn
  • No microphone access: everything is done by tapping, one-handed
Support

Frequently asked questions

Can you learn to read sheet music without an instrument?

Yes. Reading a score and playing an instrument are two separate skills. Cléo teaches reading only: recognising notes, durations, rests and bars. Everything is done by tapping the screen, with no instrument and no gear.

Does Cléo listen to me play?

No. The app never asks for microphone access and never listens, at any point. Exercises are answered by tapping the screen, one-handed.

Is Cléo free?

The course is entirely free: all eight chapters, all 37 lessons and every exercise, with no exceptions. The optional subscription, at €4.99 per month or €34.99 per year, removes the ads and gives unlimited lives. It unlocks no content.

Do I need to know any music theory to start?

No. The first chapter starts from the five lines of the staff and assumes nothing. If you already read music, a placement test finds what you know and opens the chapter where it stops being obvious.

How long is a lesson?

About two minutes. The course has eight chapters and 37 lessons, built to fit the wait on a station platform rather than a practice session.

Something wrong, or a question?

Write to contact@eyland.app, we answer directly.