Last updated: August 12, 2026
Yi Han Zi values your privacy. This policy explains what data we collect, why we collect it, and how we protect it.
What data we collect
Email address (optional)
If you choose to sign up, we collect your email address to save your learning progress across devices.
Learning progress
We store which characters you have learned and your learning streak. This data is associated with your email address if you sign up, or stored locally in your browser if you don't.
Usage data
We collect anonymous usage data (page views, feature usage) to improve the site. This data does not identify you personally.
How we use your data
- To save your learning progress across devices
- To improve the site based on how users interact with it
- To send you important updates (if you opt in)
Where your data is stored
Your data is stored securely on Supabase, a secure cloud database. We do not share your data with third parties.
Your rights
- You can access your data at any time
- You can delete your account and all associated data
- You can opt out of any communications
To exercise any of these rights, contact us.
Cookies
We use minimal cookies to remember your login session and learning preferences. We do not use tracking cookies for advertising.