Privacy Policy

Overview

Millennium Problems (“the App”) is developed and published by FlutterPlaza. We are committed to protecting your privacy. This policy explains what data the App accesses, how it is stored, and your rights.

Data We Collect

We do not collect any personal data.

The App does not require an account, does not use analytics or tracking services, and does not transmit any information over the internet.

Data Stored on Your Device

The App stores the following data locally on your device using browser or app storage. This data never leaves your device:

• Your selected grade level
• Progress: completed problems, quiz scores, XP, and badges
• Biometric lock preference (enabled or disabled)
• WebAuthn credential identifier (if biometric lock is used on web)

You can clear this data at any time by clearing the app’s storage in your device settings or browser.

Biometric Authentication

The App offers an optional biometric lock feature (Face ID, Touch ID, fingerprint, or other device biometrics). When enabled:

• Authentication is handled entirely by your device’s operating system
• No biometric data is accessed, stored, or transmitted by the App
• The App only receives a success or failure result from the system

Third-Party Services

The App does not integrate any third-party analytics, advertising, crash-reporting, or data-collection services.

Children’s Privacy

The App is designed for users of all ages, including children. Because we collect no personal data and require no account, the App complies with applicable children’s privacy regulations including COPPA.

Changes to This Policy

We may update this policy from time to time. Changes will be reflected on this page with an updated date. Continued use of the App after changes constitutes acceptance.

Contact

If you have questions about this privacy policy, contact us at:

contact@flutterplaza.com