Effective Date: August 21, 2026 App Name: Note Ear Training & Metronome

We value your privacy. This policy explains how this app collects, uses, stores, and protects information. Please read it carefully before use. By using this app, you acknowledge and agree to this policy.

I. What Information We Collect This app focuses on local practice; in principle, we do not require you to register an account. The information involved may include:

  1. Local Practice Data Ear training records, mastery progress, preference settings, etc., are stored locally on your device by default to facilitate practice functions. We do not automatically upload this practice data to our own servers for operational purposes.
  2. Microphone Information When you actively use the tuner and grant microphone permission, the app captures ambient sound in real-time for pitch detection. This process is used solely for immediate tuning feedback; we do not upload your audio content or use it for any other purpose. You may revoke microphone permission in your system settings at any time.
  3. Purchase and Subscription Information In-app purchases are processed by Apple. We may receive transaction receipts, subscription status, and similar data from Apple to verify membership benefits and restore purchases. We do not collect or store sensitive payment information such as bank card numbers or payment passwords.
  4. Device and Diagnostic Information (if applicable) Subject to system permissions or your authorization, limited technical information—such as device model, system version, and crash logs—may be generated to help troubleshoot issues and improve stability. II. In-App Purchase Prices Weekly Membership (Trial): ¥28/week (includes a 3-day free trial) Weekly Membership (Promo): ¥6 for the first week, then ¥25/week Annual Membership (Promo): ¥128/year (includes a 3-day free trial) Weekly Membership: ¥28/week Monthly Membership: ¥48/month Annual Membership: ¥198/year

III. How We Use Information

  1. To provide core functions such as ear training, tuning, and the metronome;
  2. To verify and restore membership subscription status;
  3. To improve app performance and fix bugs;
  4. To process information when required by laws and regulations or when necessary to protect legitimate rights and interests. We do not sell your personal information.

IV. Information Sharing

  1. Payments and subscriptions: Processed via the Apple App Store / StoreKit; Apple handles relevant data in accordance with its own rules and privacy policy.
  2. We will not sell or rent your personal information to unrelated third parties unless we have obtained your consent, are fulfilling a legal obligation, or it is necessary to protect the significant legitimate rights and interests of us and our users.

V. Information Storage and Security

  1. Local practice data is primarily stored on your device.
  2. Status information related to Apple transactions is managed according to Apple's mechanisms.
  3. We will implement reasonable and feasible security measures to protect information; however, please understand that no network or device environment can guarantee 100% security.