Privacy policy
Last updated 2026-09-04
What we collect
StumpDeck is a reference site. There is no account, no login and no newsletter database. We collect aggregate page analytics (page path, referrer, country, device class) so we know which calculators are used. We do not sell data and we run no advertising trackers.
Calculator inputs
Every calculator on this site runs entirely in your browser. The diameter, height, access and price figures you type are never sent to a server and are gone when you close the tab.
Analytics and hosting
Pages are served by Vercel, which records standard request logs. Aggregate usage is measured by a self-hosted Umami instance served first-party from this domain, and by Vercel Analytics. Neither sets an advertising cookie or builds a cross-site profile.
Contact
Questions about this policy, or a request to have something removed, go to privacy@stumpdeck.com.