Cookies and local storage

SigmaField does not use advertising or analytics cookies. To work, it keeps a few items in your browser's local storage:

• your progress: the lessons you have completed, the exercises you have passed and the practice problems you have solved;
• unfinished exercise and practice code, so you can return to it;
• your weekly goal, your choice of light or dark theme, and whether you hid the course contents beside lessons;
• if you sign in, your session, so you stay signed in.

You can remove all of these at any time by clearing this site's data in your browser settings.