Cookies and storage

City Costs uses browser storage for sign-in (the Supabase session), your light or dark choice, your ad choice, and guest saves and history (cleared when you close the tab). These are needed for the site to work.

Advertising (Adsterra, for visitors without Premium) can set its own cookies inside its sandboxed frame. In the EEA, the UK and Switzerland we ask first. Change your choice any time with "Cookie and ad settings" at the bottom of the page.