Privacy Policy

Last Updated: October 24, 2023

This Privacy Policy describes how "Nana Pinyin Tutor" ("we," "us," or "our") collects, uses, and protects your information. We strongly believe in your right to privacy. Our app is designed to function without requiring you to create an account or provide personal contact information.

1. Voice Data and Microphone Access

To use the AI Pronunciation Coach, the App requires access to your device's microphone.

• 100% Offline Processing: All voice recognition and pronunciation scoring are performed entirely locally on your device using offline AI models.
• No Audio Recording: We DO NOT record, save, upload, or transmit your voice data to our servers or any third parties. Your voice stays strictly on your device.

2. Information Collected Automatically by Third Parties

While we do not collect personal data directly, we use trusted third-party services to provide core functionalities (such as unlocking premium features and displaying ads). These services may collect anonymous data:

• RevenueCat (In-App Purchases): We use RevenueCat to manage subscriptions and purchases. RevenueCat generates an anonymous App User ID to link your purchases to your device's Apple ID or Google Play account. They do not collect your name or email.
• Google AdMob (Advertising): For free users, we use Google AdMob to display ads. AdMob may collect device identifiers and usage data to serve relevant ads. You can manage your ad tracking preferences through your device's system settings.

3. How We Use Information

Any anonymized data collected is used solely to:

• Verify your premium subscription status.
• Serve non-intrusive advertisements to free users.
• Monitor app crashes and improve performance.

4. Data Retention

Because we do not maintain user accounts or databases of personal information, there is no personal data for us to retain or delete. Purchase history is retained by Apple, Google, and RevenueCat in accordance with their respective policies.

5. Children's Privacy

Our App is safe for educational use. We do not knowingly collect Personally Identifiable Information (PII) from children under 13. Voice data is processed offline and never stored.

6. Changes to This Policy

We may update our Privacy Policy periodically. Changes will be reflected within the App.

7. Contact Us

If you have questions about this Privacy Policy, please contact us at: mymagicbook2023 #￥ hotmail.com (Please replace #￥ with @, - It is a simple obfuscation technique designed to prevent automated bots from harvesting email addresses to reduce spam, while allowing human users to easily reconstruct the valid contact information.)