Privacy Policy
groundmath.com is a static calculator site. You can use every calculator without an account, and we run no analytics, no advertising, and set no cookies. This page explains the little that is processed anyway, and your rights.
Controller / Verantwortlicher
Cloudwards e.K., Inhaber Oliver Sinz, Klostersteige 15, 87435 Kempten, Germany — hello@groundmath.com(see the legal notice).
Hosting and server logs
This site is hosted by Vercel Inc., 440 N Barranca Ave #4133, Covina, CA 91723, USA, acting as our processor. When you request a page, Vercel processes the technical data any web server needs — your IP address, the requested URL, time, browser user agent — to deliver the page and protect against abuse. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in operating a secure website). Transfers to the USA are covered by the EU standard contractual clauses in Vercel's data processing agreement. We do not access these logs for any purpose beyond error diagnosis.
Calculator inputs
Calculations run entirely in your browser. The values you enter are reflected in the page URL so you can bookmark and share results — which means anyone you share such a link with, and the server logs above, can see those values. They contain measurements, not personal data, and we do not evaluate them.
Your rights
Under the GDPR you have the right to access, rectification, erasure, restriction of processing, data portability, and objection (Art. 15–21 GDPR), and the right to lodge a complaint with a supervisory authority (Art. 77 GDPR) — in Bavaria: Bayerisches Landesamt für Datenschutzaufsicht (BayLDA), Ansbach. Contact us athello@groundmath.com for any request.
Changes
If we ever add analytics, advertising, or any feature that processes more data, this policy will be updated first and — where required — a consent dialog added before anything runs. Last updated: 31 July 2026.