Privacy
Every calculation on CalcDelta runs inside your browser: the numbers you type are processed on your own device and never reach our servers. We use privacy-friendly, cookieless analytics (GoatCounter) to count anonymous page views.
Last updated: 2026-09-17
Information we collect
There is no account, no sign-in and no required email address, and we never receive, store or access any value you enter into a calculator. Through GoatCounter we collect only anonymous page-view statistics — pages visited, referrer, browser and device type, screen size and approximate country — which cannot identify you personally.
Cookies and local storage
Neither this site nor our analytics provider sets tracking cookies, and the calculators write nothing to your browser’s storage. The values you type exist only while the page is open and disappear when you reload or close it.
Analytics and advertising
We use GoatCounter, an open-source, privacy-friendly analytics service, to collect anonymous statistics about page visits and traffic sources. It uses no cookies, does not track you across other websites, and stores nothing that identifies you personally. The site displays no advertising.
Third-party links
Some pages link to other websites. We do not control them and are not responsible for their privacy practices; please read the policy of any site you visit through a link.
Your rights (GDPR / CCPA)
Because we hold no personal data about you, there is nothing for us to retrieve, correct, export, or delete. If you are in the EU/EEA, the UK, or California and believe we hold data about you, contact us — we will confirm our position within 30 days.
Children’s privacy
The site is not directed at children under 13, and we knowingly collect no information from them. Calculators are general-purpose tools intended for a general audience.
Data retention and security
The numbers you type stay in your browser session and never travel over the network. GoatCounter retains only the anonymous, aggregate page-view statistics described above; it stores no data that identifies you personally, and we never store the values you enter.
Changes to this policy
We may update this page as the site changes. The date shown at the top reflects the latest revision, and material changes will be reflected here before they take effect.
Contact
Questions about this policy or about how the site works: hqzhon@gmail.com