Watt Math has no accounts, no comment forms, and no newsletter. We do not ask for your name or email, and the pages themselves do not set cookies.
Affiliate links
When you click a "Check price" button you leave this site for a store. That store, or the affiliate network it uses, may set a cookie so it knows the visit came from us. Their privacy policy covers what happens next.
Hosting
Our hosting provider keeps standard server logs, such as IP address and the page requested, to keep the site running and block abuse.