Support
Contact us
The fastest way to reach us is in the app: open the Profile tab, then tap Feedback. You can send general notes, bug reports, or feature requests. If you are signed in, we may receive the email address associated with your account and an internal user identifier to help troubleshoot (see our Privacy Policy).
For matters that cannot go through the app, email hanzi.cool.org@gmail.com. Update this address on this page if you use a different inbox.
Common questions
Sign-in and account
Hanzi.cool uses Clerk for authentication (for example, email or social sign-in, depending on what is enabled in the app). If you cannot complete sign-in, confirm you have network access, update to the latest app version, and try again. For account deletion or data requests, contact us using the email above and include the address you used to sign in.
Practice reminders (notifications)
Reminders are optional. To change them, open Profile → Notifications in the app. If you previously denied permission, open Settings on your iPhone → Hanzi.cool → Notifications and enable alerts.
Sessions, quiz, and progress
Your study progress and review state are stored on your device. If data looks wrong after an update, force-quit the app and reopen it. If the problem persists, send a Feedback message with what you expected to see and what happened instead.
Privacy
For details on what we collect and which services we use, read the Privacy Policy.