Clefpop Privacy Policy

Effective date: 2026-10-23

Clefpop is a sight-reading practice app: notes appear on a music staff and you name them on a piano keyboard or with name buttons, with lessons, progress stats and a reference chart (the "app"). It is provided by DDJ A1 ("we", "us"). This policy explains what data the app handles and how. Clefpop has no account system and we do not run a server for it.

Data stored on your device

Your practice settings (clef, note range, session length, note-name style and so on), your practice history (session dates, number of notes and accuracy), per-note accuracy and response times, and your lesson stars are stored only on your device. They are not sent to us. Note sounds are generated on your device. Uninstalling the app deletes this data from your device. If device backup is turned on, Android's standard app backup may include this data in your own Google account backup. That backup is controlled by you and Google, not by us.

Sharing

When you use Share (for example a session result card), the app creates the image on your device and hands it to the app you pick in the Android share sheet. The app does not upload anything by itself.

Permissions the app asks for and why

• Notifications (optional). Used for a short daily practice reminder. You can decline and every feature still works.
• Run at startup. Lets reminders and the home screen widget come back after your phone restarts or the time zone changes.
• Vibration. Short haptic feedback when you name a note incorrectly.
• Internet access and the advertising identifier (AD_ID). Used only by the advertising components described below. Practice, lessons and stats work offline.

The app does not use the microphone, the camera, location permission or your contacts.

Information collected automatically

When you use the app, third-party SDKs used for advertising may collect some information automatically, including:

• Your device's Internet Protocol (IP) address, which may be used to estimate your approximate (general) location
• Device or other identifiers, such as your device's advertising identifier (Advertising ID) and app set ID
• App interactions, such as session time, screens viewed, and ad views and taps
• Crash logs and diagnostic information, such as your device's operating system and model, and ad performance data

The advertising SDK collects this information and shares it with Google (AdMob) and its advertising partners for advertising, analytics, fraud prevention, security and compliance. It is encrypted in transit. The app itself does not send your practice history or stats off your device, and we do not link the advertising data to them.

Advertising

The app shows advertisements from Google AdMob:

• a banner at the bottom of most screens (never on the practice screen where you tap the keyboard)
• an ad when the app starts
• full-screen ads only at natural pauses, for example when a session or lesson result opens

To serve ads, AdMob and its partners may access your device's Advertising ID and the information described above. In the European Economic Area (EEA), the United Kingdom and other regions where required, the app shows a consent form through Google's User Messaging Platform (UMP) before personalized advertising data is used. If you decline, you are shown non-personalized ads instead. You can reset or limit ad personalization at any time in your device settings (Settings → Google → Ads), and you can change your consent choice from the app's Settings screen.

For more information on how Google uses data when you use partners' apps, see https://policies.google.com/technologies/partner-sites.

Children

Clefpop is a general-audience app and is not directed to children under 13. We do not knowingly collect personal information from children.

Your rights

Your data exists only on your device, so you control it directly: uninstalling the app removes everything the app stored. Depending on where you live (for example under the GDPR in the EEA/UK or the CCPA in California), you may also have rights over data processed by advertising SDKs. You can exercise your ad choices through the consent form and your device's ad settings described above.

Changes

We may update this policy. Material changes will be reflected on this page with a new effective date.

Contact

Questions? Email bloodturtle@naver.com.