Last updated: 22 March 2026
Listener ("the app") is developed by Daniel Clifton. This policy describes what data the app collects, how it is used, and your rights.
Listener accesses your device microphone to detect and identify piano exercises. All audio processing happens entirely on your device. Audio data is never uploaded, stored on a server, or shared with any third party. When you stop a session, the audio buffer is discarded.
The app uses PostHog to collect anonymous usage analytics. This helps us understand how the app is used and improve it. The data collected includes:
Analytics data is associated with a randomly generated anonymous identifier — not your name, email, Apple ID, or any personally identifiable information. We do not track your location, contacts, or browsing activity.
In-app subscriptions are processed by Apple through the App Store. We use RevenueCat to manage subscription status. RevenueCat receives your anonymous app user ID and subscription status from Apple. It does not receive your name, email, or Apple ID. See RevenueCat's privacy policy.
The app stores session history, exercise scores, and your preferences locally on your device. This data is not uploaded to any server. If you delete the app, this data is deleted.
Listener does not collect, store, or transmit any personally identifiable information. We do not require an account, login, or registration. We do not have access to your name, email address, or Apple ID.
Listener does not track you across other apps or websites. The app's privacy manifest declares NSPrivacyTracking: false.
Listener does not knowingly collect personal information from children. The app does not require or collect any personal data from users of any age.
We may update this policy from time to time. The "last updated" date at the top will reflect any changes. Continued use of the app after changes constitutes acceptance of the updated policy.
If you have questions about this privacy policy, contact us at support@pianolistener.app.