Privacy policy

Last updated: 7 November 2026

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ChopiNote is published by [Legal entity name], [postal address] (“we”). Contact for privacy questions and requests: support@chopinote.com.

What we collect

• Guests: learning progress (XP, streak, stars) stays on your phone and may sync under a random device identifier that is not linked to your identity.
• Account (optional): you can use the app as a guest, but adding a song to your favorites, making lessons from a song, importing files, recording, the leaderboard and achievements ask you to sign in first. If you sign in with email, Google or your phone number we process your email address or phone number, display name, photo (optional), a bio you write, and the sign-in provider, through Firebase Authentication. For phone sign-in your number is used to text you a one-time code (message and data rates may apply) and to recognise you when you come back; we do not use it for marketing.
• Fingerprint / face login (optional, Android): if you turn it on, your phone checks your fingerprint or face. That data stays inside Android and is never sent to us. We store a random device token on your phone and only a hash of it on our server; it lets you sign in without typing your password and is deleted when you turn the option off, when we suspend the account, or when you delete your account.
• Synced data: progress, favorites, downloaded-song list, achievements, settings and recording metadata. Recording files and scores you back up are stored in Firebase Storage, in a folder only your account can read.
• Leaderboard: if enabled, your first name, last initial and XP are shown to other signed-in players.
• Technical data: IP address and request time in server logs for security; crash reports and diagnostics (Firebase Crashlytics, Performance Monitoring); usage events such as screens opened and lessons finished (Firebase Analytics); a push token for practice reminders (Firebase Cloud Messaging); and app configuration (Firebase Remote Config, App Check to protect our service).

Microphone

The app asks for microphone access to recognise the notes you play on a real piano and to record. While you practise, audio is analysed in real time on your device and is not stored or sent anywhere. The Record feature saves the notes it recognised (pitch and timing); if you turn on cloud backup, that score data is uploaded to your account folder. See the next section for what is sent to our server when you record or import.

Imports, recordings and scans

• Audio (Record tab and Import): to turn a recording or an audio file into sheet music, the audio is sent to our server for AI transcription (and, for formats other than WAV, converted first). This is optional: you can turn AI transcription off in Settings, and the app then works with the notes recognised on your device.
• PDF and photos of sheet music: the file is sent to our server to be read as notes (optical music recognition).
• Retention: each file is processed in a temporary folder that is deleted right after the request. We do not keep these files, and we do not log their content. The resulting score is stored on your device, and in your account only if you turn on backup.
• You must have the right to use the music files and scores you import (see the terms).

Web app

The web app at chopinote.com/app stores your progress and sign-in session in your browser (local storage) and talks to the same service as the phone apps. Microphone audio is processed in your browser, and files you choose to import are handled as described in “Imports, recordings and scans”. Computer-keyboard play stays in your browser. The web app shows no ads. Clearing the site data in your browser removes the local copy.

Service providers

Google (Firebase) processes the data described above on our behalf. We do not sell personal data.

Advertising

The Android app shows ads served by Google AdMob (banner, native, interstitial and app-open formats). A full-screen ad can appear at natural breaks, such as after you choose a file to import or when you turn a song into practice; it can be closed and never covers a song while it plays. AdMob uses the device advertising ID and basic device and usage data to choose and measure ads; this data is collected by and shared with Google. We do not sell personal data and we do not share your recordings, files or account details with advertisers. Where the law requires it (EEA, UK), the app first asks for your consent through Google’s consent form, and you can change it later from the same form. You can reset or delete your advertising ID in your phone’s Settings → Google → Ads. See Google’s advertising policy.

Your choices

• Use the app as a guest, or sign out at any time.
• Turn off AI audio transcription, analytics, reminders and cloud backup in Profile → Settings.
• Delete your account and all data: Profile → Account management → Delete account, or see how to delete your account.
• Revoke microphone access in your phone settings.

Children

ChopiNote is meant for people aged 13 and over and is not directed to children under 13. We do not knowingly collect personal data from children under 13; if you believe a child has created an account, write to us and we will delete it.

How long we keep data

• Account data, progress, favorites, settings, backups and push tokens: until you delete your account.
• Imported, recorded and scanned files: deleted right after the request (not kept).
• Server logs (IP address, request time): a short period, then deleted automatically.
• Crash, performance and analytics data: according to Firebase retention settings.
• Feedback you send: until we delete it; ask us to remove it at any time.

Delete your account and data

In the app: Profile → Account management → Delete account. Without the app: chopinote.com/delete-account or email support@chopinote.com. Deleting removes your profile, progress, favorites, achievements, cloud recordings, push tokens and login token. Guest progress stored under a device identifier can be deleted on request.

Your rights

Depending on where you live (for example EEA/UK GDPR, California), you may ask to access, export, correct or delete your data, object to or restrict processing, and withdraw consent. You can export your data in Profile → Account management → Export My Data or email us. We process data to provide the app (contract), for security and quality (legitimate interests) and for ads and analytics where you consent. Data is processed by Google (Firebase, AdMob) and our hosting provider (Google Cloud), possibly outside your country, under their standard safeguards. You may also complain to your data protection authority.

Changes

We will update this page and its date when our practices change.

Contact

See the support page.