Privacy

Short version: your progress never leaves your device.

What we store

Your answers, streaks, achievements and preferences (theme, text size, sound) are saved in your browser using IndexedDB and localStorage. They are not sent to any server. Clearing your browsing data deletes them — useDownload backup to keep a copy.

Accounts and tracking

There are no accounts, no analytics and no advertising cookies.

Text-to-speech

“Listen” buttons use your device’s built-in voices. Depending on your browser, the text may be processed by the browser vendor’s speech service.

Contact

Questions about privacy? Let us know.