Privacy policy

We collect your email, display name, login session, courses you generate or save, learning progress, and questions you ask in a course.

You can leave a note on the feedback page. We keep what you write, an optional course or YouTube link, and the language and device you chose if you filled them in. If you are signed in, we also keep your account so we can look at the related learning record. Admins read this in the product; we do not email it.

We use this to sign you in, remember progress, generate learning systems, and improve the product. We do not sell your personal information.

Your interface language is stored in the browser and a language cookie so the next visit can stay in Chinese or English.

Generation sends captions to a model provider (for example Kimi) so we can write chapters and a learning map. Do not put passwords or ID numbers into questions.

You can request to close your account from the account page. We email a confirmation link; a second click closes it. After that you cannot sign in. Public courses you published may remain, with the author name shown as a deleted account. Records we must keep for payments or the law may not be erased immediately.