Cléa was born from a simple conviction: anyone who wants to learn piano but can't afford lessons should be able to learn at least the basics. This project matters to me personally — so Cléa is, and will stay, 100% free, no exceptions. No subscription, no in-app purchase, no ads.
A problem, a question, a suggestion?
Write directly to jmetro.run@gmail.com — we reply as fast as we can.
Frequently asked questions
The app asks for the microphone, is it required?
No, it's optional. It's only used to recognise notes played on a real
piano during a lesson (the "real piano" feature). You can decline and
keep learning without it.
What about the "offline" screen?
Cléa needs an internet connection (lessons and voice are loaded
online). Check your WiFi/mobile data, then tap "Retry".
How do I change the language or notation
(letters/solfège)?
On the "Your lessons" screen, at the top: FR/EN switch and the
"🔤 letters" toggle.