Last updated: 24 August 2026
This policy covers the CS42.org website. Each of our iOS apps has its own privacy policy on its app page — see Mobile Apps for the full list.
We only collect what you type into a form. Nothing is gathered in the background, and you can browse the whole site without giving us anything.
Only to reply to you and to send the release announcements you asked for. We do not use your details for anything else, and we never sell, rent, or share them.
This site sets no cookies of its own and runs no analytics or tracking scripts. Two third parties do receive a request when a page loads: Google Fonts, which serves the typefaces, and Firebase on pages that use a form or multiplayer. Both can see your IP address as part of that request, as any server does.
The multiplayer quizzes connect to Firebase to run live games. Room codes, nicknames, and scores entered there are used only during the game session and are visible to the other players in that room. Please do not enter anything private as a nickname.
The site is not directed at children under 13, and we do not knowingly collect their details. If you believe a child has submitted a form, email us and we will delete it.
Email hello@cs42.org at any time to see what we hold about you, to correct it, or to have it deleted. We will action deletion requests promptly.
If this policy changes, the new version will be posted on this page with an updated date.
Questions about anything on this page?
hello@cs42.org