Privacy Policy

Summary

This site does not collect personal data. There are no accounts, no tracking cookies, no analytics, and no advertising. An optional sync feature stores your study progress on our server under a random identifier — see below.

Data stored on your device

Your quiz history, statistics, study streak, bookmarks, missed questions, reading progress, and theme preference are stored exclusively in your browser's localStorage. This data never leaves your device and is never transmitted to any server. Clearing your browser data (or using the "Reset progress" button on the dashboard) permanently deletes it.

Optional sync (data stored on our servers)

If you choose to save your progress on the dashboard, your study data (quiz statistics, history, missed questions, bookmarks, reading progress, and flashcard scheduling) is stored in our database under an avatar name you invent or a randomly generated identifier. No email, IP address, or any other personal information is attached to it, and we cannot link it to you. Do not use your real name as an avatar name. Access secrets are stored only as hashes. You can delete this data at any time with the "Delete server data" button on the dashboard, which removes it permanently. Sync is off by default.

Beyond that, standard web server logs (IP address, requested URL, user agent) may be produced by the hosting provider for operational and security purposes and are subject to that provider's retention policies.

Third parties

We do not embed third-party trackers, social media widgets, or external fonts/CDNs that would receive your browsing information from this site.

Your rights

We hold no personal data about you. Your study data lives on your own device, plus — only if you enabled sync — a pseudonymous copy on our server that you can export (dashboard, "Export backup") or permanently delete ("Delete server data") yourself at any time.

Contact

Questions? Reach out via the contact listed in security.txt. See also our Terms & Conditions.