1. Introduction
Welcome to Hanzi Rush ("we", "our", or "us"). We are committed to protecting your personal information and your right to privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our Chinese character learning application.
2. Information We Collect
We collect minimal information necessary to provide our service:
- Email Address: Used for account authentication (Magic Link login)
- Username: Optional display name you choose
- Learning Progress: Your study statistics, character mastery levels, and session history
- Preferences: Language settings and interface preferences
3. How We Use Your Information
Your information is used exclusively to:
- Provide and maintain the Hanzi Rush service
- Track your learning progress and optimize your study experience
- Send authentication emails (Magic Links for login)
- Improve our application based on aggregated, anonymized usage data
4. Data Storage and Security
Your data is stored securely using industry-standard practices:
- All data is encrypted in transit (HTTPS/TLS)
- Database access is protected by Row Level Security (RLS) - you can only access your own data
- We use Supabase, a SOC2-certified database provider
- We do not store passwords - we use passwordless authentication (Magic Link)
5. Data We Do NOT Collect
- Passwords (we use Magic Link authentication)
- Payment card numbers (processed by third-party payment providers)
- Location data
- Device identifiers
- Contacts or phone numbers
6. Third-Party Services
We use the following third-party services:
- Supabase: Authentication and database (PostgreSQL)
- Vercel: Hosting and CDN
- Sentry: Error monitoring (no personal data collected)
- Upstash: Rate limiting service (IP addresses temporarily stored)
7. Your Rights
You have the right to:
- Access: Request a copy of your personal data
- Rectification: Correct inaccurate information
- Deletion: Request deletion of your account and data
- Portability: Export your learning progress data
To exercise these rights, please contact us at support@hanzirush.com
8. Children's Privacy
Hanzi Rush is suitable for users of all ages. We do not knowingly collect personal information from children under 13 without parental consent. If you believe we have collected information from a child under 13, please contact us immediately.
9. Data Retention
We retain your data for as long as your account is active. If you delete your account, all your personal data will be permanently removed within 30 days.
10. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.
11. Contact Us
If you have any questions about this Privacy Policy, please contact us:
- Email: support@hanzirush.com