Nothing is collected.

This covers Eureka on Apple Vision Pro, its browser version, and this website.

The app

Eureka has no accounts, no advertising and no analytics. It does not send anything about you anywhere. Which lessons you have finished and your settings are kept on your own device, and are removed when you delete the app.

The browser version and this site

There are no cookies and no tracking. The browser version remembers your progress and settings in your own browser. It loads one open-source drawing library from a public content network, which, like any web server, sees the address your request comes from.

Questions

Write to konstantin.zolozhkov@gmail.com.

Last updated 13 October 2026.