No account needed
The site does not ask you to create an account. The site uses Yandex Metrika (counter 112847434) to measure visits, page views, link clicks and click maps. Session replay (Webvisor) is not enabled. Ordinary hosting access logs may contain your IP address, requested page and browser information.
Your check answers
Check answers are used only in memory on the current page. They are not sent to a server or added to the page URL. Leaving or reloading the page clears them.
Planner & introduction preferences
Planner tasks are stored in localStorage in this browser, including notes, dates and priorities. Introduction answers are saved only if you select “Remember my preferences”. They do not sync across devices. Anyone using the same browser profile may be able to see saved information. Clearing site data in your browser deletes it; export planner tasks first if you want a backup.
External services
Feedback opens Google Forms, and the student chat opens VK. These services receive information when you choose to visit them and apply their own privacy terms. Source links and support directories also lead to external websites.