Your privacy

You can use this version without an account.

Learning progress stays here

To resume learning, we store only your last lesson and the stages you marked as checked in your browser’s local storage. We do not ask for your name, email, or birthday, and we do not send your learning progress to a server.

Ads and external tracking

This version has no ads, third-party analytics, read-aloud feature, or camera access. If you follow an external reference link, that website’s privacy policy applies.

Before public hosting

This notice describes the current implementation. Before public deployment, it must be completed with the chosen host’s access logging details and the operator’s contact information. If ads or server storage are added, their purpose and data handling must be explained first.

As of November 7, 2026