Privacy Policy

Last updated: February 25, 2026

1. Information We Collect

When you use QuantVault, we collect the following information:

• Account information: Your name, email address, and profile photo provided through Google authentication.
• Usage data: Problems you've attempted, solutions you've viewed, courses you've completed, and your progress across the platform.
• Payment information: Subscription and billing data processed securely through Stripe. We do not store your credit card details on our servers.
• Notes: Any personal notes you save on problems are stored in your account.

2. How We Use Your Information

We use your information to:

• Provide and maintain the Service
• Track your learning progress and display your achievements
• Process subscription payments
• Improve the platform and user experience
• Communicate important updates about the Service

3. Data Storage and Security

Your data is stored securely using Google Firebase (Firestore). We use industry-standard security measures to protect your information. Payment processing is handled by Stripe, which is PCI DSS compliant.

4. Third-Party Services

We use the following third-party services:

• Google Firebase: Authentication and data storage
• Stripe: Payment processing
• Google Analytics: Anonymous usage analytics to improve the Service
• GitHub Pages: Website hosting

5. Cookies

We use essential cookies for authentication and session management. We use analytics cookies to understand how the Service is used. You can disable cookies in your browser settings, though this may affect functionality.

6. Data Retention

We retain your account data for as long as your account is active. If you delete your account, we will delete your personal data within 30 days. Anonymized usage statistics may be retained indefinitely.

7. Your Rights

You have the right to:

• Access your personal data
• Request correction of inaccurate data
• Request deletion of your account and data
• Export your data

To exercise any of these rights, contact us at [email protected].

8. Children's Privacy

QuantVault is not intended for children under 13. We do not knowingly collect personal information from children under 13.

9. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of material changes via email or site notification.

10. Contact

For questions about this Privacy Policy, contact us at [email protected].