Privacy Policy

Last updated: 14 July 2026

We only collect information required to provide accounts, practice history, and synchronization.

Information we collect

Registration email, display name, avatar, sign-in provider, recognition results, scores, and learning progress. Practice recordings remain in this browser.

How we use it

To authenticate users, synchronize data, generate pronunciation analysis, recover accounts, and maintain service reliability.

Storage and deletion

Account data, scores, and analysis are stored on the server. Practice recordings are stored only in this browser and do not synchronize across devices. Deleting a practice record also removes its local recording from this browser.

Third-party services

Google sign-in provides a verified email, name, and avatar through OAuth. We never receive your Google password.

Security

Passwords are irreversibly hashed, sessions use secure cookies, and verification codes expire with attempt limits.