Privacy Policy
Last updated 22 August 2026
What is stored, and where
Your progress is kept in your browser's localStorage under this
domain. That includes your rating, daily streak, puzzle history, gem balance
and whether you have unlocked The Vault.
This data sits on your computer. It is not uploaded, not backed up by us, and not readable by us. Clearing your browser data for this site deletes it permanently, and there is no copy anywhere else.
What we do not collect
- No accounts, names, email addresses or passwords
- No analytics or tracking scripts of our own
- No cookies set by us
- No payment details — nothing here is for sale
Third-party content in The Vault
The Vault embeds browser games that are hosted by other people, loaded in an isolated frame from their own websites. When you open one, your browser connects directly to that host, which will see your IP address the same way visiting any website does. Those hosts have their own privacy practices, which we neither control nor can speak for.
Each game is sandboxed, and the sandbox deliberately withholds permission to open new tabs or navigate this page away, so an embedded game cannot redirect you elsewhere.
Hosting
The site is served as static files by Cloudflare Pages. Cloudflare processes standard request logs (IP address, user agent, requested URL) as part of serving and protecting any website. See Cloudflare's own privacy documentation for what that involves.
Advertising
The site reserves space for advertising but currently serves no ads and loads no advertising scripts. If that changes, this page will be updated first, and any advertising partner's use of cookies will be described here before it goes live.
Children
MatrixMind is a reasoning-practice site suitable for all ages. Because it collects no personal information at all, there is nothing about a child user to protect, share or delete.
Contact
Questions about this policy: see the contact page.