Privacy policy
Last updated: November 2026
What we collect
Nothing personal. We don't ask for your name or email, and we don't use tracking scripts or advertising cookies.
What your browser stores
Your settings, tasks, statistics, study files and uploads are saved in your browser's local storage and IndexedDB. They never leave your device.
Videos you add
YouTube links play through youtube-nocookie.com and Vimeo links through Vimeo, so those services see that a video was played. Video files you upload stay on your device.
Third parties
Fonts are loaded from Google Fonts. Your hosting provider may keep standard server logs, such as IP addresses, for security.
Deleting your data
Go to Settings and choose Reset everything, or clear this site's data in your browser.
Contact
Questions about privacy? Write to us using the address on the Contact page.