Privacy Policy

Last updated: March 2026

1. Overview

KanjiDraw ("the App") is an educational application for learning Japanese kanji. This policy explains what data is collected, how it is used, and how you can manage it.

2. Data We Collect

2.1 Account data (registration only)

If you create an account, we collect your email address. Passwords are stored encrypted on Google Firebase Authentication servers and are never accessible to us in plain text.

2.2 Progress data

To save your learning progress, we store:

  • list of unlocked kanji;
  • mastery status for each kanji (guided / from memory);
  • Silver and Gold row progress per level;
  • Time mode scores with timestamps;
  • earned badges.

This data is stored locally in your browser (localStorage). If you have an account, it is also synced to Google Firestore for cross-device access.

2.3 Analytics

The App uses Google Firebase Analytics to collect anonymised statistics: number of mastered kanji, activity by level, user type (registered / anonymous). No personal information is included.

2.4 Data we do NOT collect

  • name, age, or phone number;
  • location;
  • kanji drawings or handwriting attempts;
  • payment data.

3. How We Use Data

  • User authentication and identification.
  • Syncing progress across devices.
  • Improving the app using aggregated statistics.

We do not sell, share, or use your data for marketing or advertising purposes.

4. Data Storage

Data is stored on Google servers (Firebase / Firestore) in accordance with the Firebase Privacy Policy.

Local data (localStorage) is stored on your device and deleted when you clear your browser data.

5. Your Rights

  • Delete data. You can reset your progress via the profile. To fully delete your account, contact us.
  • Anonymous use. The app works fully without registration — progress is saved locally only.

6. Cookies and Tracking

The app does not use third-party cookies or advertising trackers. Firebase Authentication and Analytics may set service cookies for session management and analytics.

7. Children

The app is not intended for children under 13. We do not knowingly collect data from children.

8. Policy Changes

We may update this policy. The date of the last update is shown at the top of this page.

9. Contact

For privacy questions, email [email protected].