Privacy Policy
Effective 12 July 2026
The short version: your practice happens on your device, your account is your Google email, your card belongs to Stripe, and we don't sell or share anything.
What stays on your device
Practice history, generated exercises, imported MIDI files, settings, level progress and audio all live in your browser's local storage on your own device. They are not uploaded to our servers. Clearing the site's data in your browser deletes them.
What we store about you
When you sign in with Google we receive and keep your name, email address and Google account identifier, plus your subscription status. That is the extent of our user database. We use it to know who you are, whether your subscription is active, and to contact you about your account.
Payments
Payments are processed by Stripe. Your card details go directly to Stripe and never touch our servers. We store only the subscription status Stripe reports back.
Third parties
- Google: sign-in only.
- Stripe: payment processing.
- Cloudflare: serves the website (CDN) and routes our email; like any web host it sees standard connection logs (IP address, pages requested).
There are no advertising trackers or analytics scripts on the site or in the app.
Your rights
Email [email protected] to access or delete the account data we hold. Deleting your account removes your record from our database; on-device data you can clear yourself at any time. For users in Brazil this operates under the LGPD; for users in the EU, under the GDPR.
Changes
If this policy changes materially we will announce it in the app or by email.