What the site stores
A last-visit timestamp is saved locally in your browser. The ending calculator's numbers are not saved or sent anywhere. Clearing this site's browser data removes the timestamp, and guides also work when browser storage is unavailable.
Analytics
The site uses Vercel Web Analytics for aggregate page views, return visits, searches with and without results, ending-calculator use and source clicks. Events include the guide path, not your search text or the numbers you enter.
In production, the site also loads Google Analytics 4, which sets first-party cookies in your browser to help distinguish visitors and reports standard page-view and engagement measurements to Google. Google processes that data under its own privacy policy, and you can block or delete these cookies in your browser settings at any time.
There are no user accounts, comments or payment forms, and no advertising networks or ad partners are integrated; Vercel Web Analytics and Google Analytics 4 are the only analytics services used.