Privacy policy
Last updated: February 2026
Overview
YumCha ("we", "our", or "us") is committed to protecting your privacy. This privacy policy explains how we collect, use, and safeguard your information when you use our mobile application.
Information we collect
Account information
When you sign in with Google or Apple, we receive your email address and display name. We use this to create and manage your account.
Learning data
We collect information about your learning progress, including completed lessons, vocabulary reviews, streaks, and preferences (romanization system, character style, daily goals).
Device information
We may collect device type, operating system version, and app version for troubleshooting and improving the app experience.
How we use your information
- To provide and personalize your learning experience
- To sync your progress across devices
- To track your learning streaks and achievements
- To improve our app and develop new features
- To communicate important updates about the service
Data storage and security
Your data is stored securely using industry-standard encryption. We use Firebase for authentication and secure cloud infrastructure for data storage.
Third-party services
We use the following third-party services:
- Firebase Authentication (Google) - for secure sign-in
- Apple Sign In - for secure sign-in on iOS
Your rights
You have the right to:
- Access your personal data
- Request correction of your data
- Delete your account and all associated data
- Export your learning data
You can delete your account at any time from the Settings screen in the app.
Children's privacy
Our app is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe we have collected such information, please contact us.
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 policy on this page and updating the "Last updated" date.
Contact us
If you have questions about this privacy policy, please contact us at privacy@yumcha.fun