The essentials in 30 seconds
The microphone listens, it doesn’t record
Sound is only used to recognise notes, live.
Never sold
Your data is never sold, rented or used for advertising.
No account to create
Your progress is saved on your phone, not on our servers.
01Who we are
Piano One is published by Mobitra, a sole trader and the controller of your personal data. We design the app and decide how your information is used to support your learning.
02The data we use
Piano One works without an account. We collect only what we need to run the app and improve it:
Your progress
Completed lessons, accuracy, streaks and playing preferences (note names, dominant hand), saved on your device.
Technical data
Device model, app version, usage statistics and crash reports. They are linked to a random identifier created when the app is installed, never to your name or an account.
Your purchases
Subscription status. Payment is handled by Apple or Google: we never see your card.
Your messages
If you write to support: your email address and the content of your message.
03The microphone
To know whether you play the right note, Piano One needs to hear your piano. You choose whether to allow microphone access, and you can withdraw it at any time in your phone’s settings.
Nothing is recorded.
Sound is analysed in real time on your device to recognise notes, then immediately forgotten. No audio file is kept or sent to our servers.
04Why we use it
06How long we keep it
Your progress stays on your device. Usage statistics are kept for 13 months. Support conversations are deleted 12 months after the last message. Feedback is kept for 24 months, and the email address you may leave with it for 12 months. Crash reports are kept for 90 days at most.
07Your rights
Under the GDPR, you can exercise the following rights over your data at any time:
- Access
- Rectification
- Erasure
- Portability
- Objection
- Restriction
If you believe your rights are not respected, you can lodge a complaint with the CNIL (cnil.fr).
08Contact us
For any question about your data or to exercise your rights, write to [email protected]. For data linked to the app, include the install identifier shown in the app settings. We reply within 30 days at most, usually much sooner.
A question about your data?
Our team replies within 48 hours.