Privacy

Last updated 10 June 2026

Short version: we don't collect your data, and there are no accounts or tracking cookies.

Your progress stays on your device

Lessons completed, XP, streaks, exam scores, flashcard schedules, and certificates are saved in your browser's localStorage. This data never leaves your device and is never sent to us or anyone else. Clearing your browser storage erases it — which is why we give you a backup code to move it yourself.

No cookies, no accounts

We don't set cookies, we don't ask you to sign up, and we don't run third-party advertising or tracking. There's nothing to opt out of because there's nothing being collected.

Hosting

The site is served as static files from a content delivery network. Standard server logs (such as IP addresses and request times) may be processed by the host purely to deliver the site and keep it secure; we don't use them to identify or profile you.

Fonts & assets

Fonts are self-hosted — your browser doesn't call any third-party font service. All assets load from the same origin as the site.

Changes

If this ever changes (for example, if optional accounts are added later), we'll update this page and make any new data collection clear and opt-in.