Privacy
Short version: an email address, a password hash, and what you have learned.
What is stored
If you create an account we store your email address, a hashed password, and your course progress. Progress means which words you have seen, how well you knew them and when they are next due. It is what makes the course work across devices.
Without an account, everything stays in your own browser and none of it reaches the server.
What is not stored
No card details. Payments, when they exist, are handled by Stripe and card numbers never touch our servers. No advertising trackers and nothing sold or shared with third parties.
Analytics
We use a self-hosted analytics install to see which pages get read and where people give up. It records page views and rough location by country. It does not follow you around other sites.
Deleting your account
Email and it will be deleted, along with all progress attached to it, within seven days. No exit interview.
Contact
Questions about any of this can go to the address in the footer.