Privacy Policy

Last updated: May 2026

1. Introduction

Leminno ("we", "our", "us") is an educational platform for olympiad mathematics. This Privacy Policy explains how we collect, use, and protect your personal information when you use our website and services.

2. Information We Collect

Account Information: When you create an account, we collect your name, email address, country, grade level, and target olympiad.

Usage Data: We collect information about how you use Leminno, including practice session data, lesson progress, and diagnostic test results.

Technical Data: We automatically collect browser type, operating system, and error logs for debugging purposes.

3. How We Use Your Information

We use your information to:

  • Provide and personalise the Leminno learning experience
  • Track your progress and adapt spaced repetition schedules
  • Send important account-related communications
  • Debug errors and improve platform stability
  • Generate anonymised, aggregate statistics

4. Data Storage

Your data is stored securely using Google Firebase (Firestore) with industry-standard encryption at rest and in transit. We use Firebase Authentication for secure identity management.

5. Third-Party Services

We use the following third-party services:

  • Firebase (Google): Authentication, database, and hosting
  • Vercel: Application hosting and CDN
  • Google Gemini API: AI-powered answer grading (your answers are processed by Google's AI)
  • Paddle: Payment processing (when Pro subscriptions are available)

6. Data Sharing

We do not sell your personal data. We only share data with the third-party services listed above as necessary to operate the platform. We may share anonymised, aggregate data for research purposes.

7. Your Rights

You have the right to:

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

To exercise any of these rights, contact us at privacy@leminno.study.

8. Cookies

We use a single essential session cookie ("__session") for authentication. We do not use tracking cookies or third-party analytics cookies.

9. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by posting a notice on our website. Continued use of Leminno after changes constitutes acceptance of the updated policy.

10. Contact

If you have questions about this Privacy Policy, contact us at privacy@leminno.study.