Privacy
Short version: we only keep your email if you ask us to, and you can leave any time.
Who's responsible
The data controller is Jakub Mráček (OSVČ, IČO 86719289, J.V. Sládka 1548, Teplice, Czech Republic). Questions: jakub.mracek@gmail.com.
What we collect
Only your email address, and only if you subscribe to updates. We don't use tracking or advertising cookies and browsing doesn't require an account. We do use privacy-friendly, cookieless analytics (via Vercel) that counts visits in aggregate and doesn't identify you.
Why, and for how long
Your email is used to send occasional updates about new puzzles and files. We keep it until you unsubscribe — there's an unsubscribe link in every email, and you can also email us to be removed.
Who processes the data
We use a few trusted providers strictly to run the site: MailerLite (email newsletter), Vercel (hosting, standard server logs, and cookieless analytics), and Lemon Squeezy (payments and receipts, if you buy the brochure). They process data on our behalf under their own terms.
Your rights
You can access, correct or delete your data, and object to its use — just email jakub.mracek@gmail.com. If you're in the EU, you also have the right to complain to your data-protection authority.
Last updated: 26 August 2026 · See also our terms.