Privacy policy
This page explains what information we hold and how it is used.
What we collect
If you create an account we store your email address and password. The password is stored only as a one-way hash, so nobody can read it back. Your favourites and study status are stored with that account.
Even without an account, requests are logged. Cloudflare, which serves this site, aggregates IP address, browser, requested page and timestamp. We do not use these logs to identify individuals.
How it is used
We use this information to sign you in, to keep your favourites and study status, to deal with abuse and to improve the site. We do not sell or share it with third parties as a mailing list.
Cookies and advertising
While you are logged in, one cookie identifies your session. It is removed when you log out.
This site uses Google AdSense, a third-party advertising service. Google and its partners may use cookies to show ads based on your previous visits to this and other sites.
You can turn off personalised advertising here:
Data sent to third parties
Loading a page contacts the following services.
- Google AdSense — serves the ads; receives cookies and request data
- Google Fonts — delivers the icon font
- Cloudflare — serves the site and aggregates traffic statistics
Retention and deletion
Account data is kept until you delete it. You can delete your account at any time from your page. Deleting removes your email address, favourites and study status permanently.
Contact
For questions about this policy or the data we hold, please write to:
Last updated: 24 August 2026