Privacy Policy
Short version: we do not collect what you type into a calculator. There is no signup, no account, no sync. The site is mostly static HTML and a small client-side script that runs the formula in your browser.
Last updated 2026-08-20
What we do not collect
Calculator inputs never leave your device. The math runs in your browser; the result is rendered locally. The full URL of a calculator page does include the inputs (so shared links reproduce the result), but those URLs are stored in your own history, not ours.
There is no backend database of user inputs. There is no account system. There is nothing to delete — we never had it.
What we do collect
Like most websites, we use privacy-friendly analytics (Google Analytics 4 with anonymized IP, and optionally Microsoft Clarity) to count how many people opened a calculator and which calculator got opened. The analytics run only when the IDs are configured via environment variables; with no IDs configured, no third-party scripts load.
The web server may log standard request metadata (IP address, user agent, requested URL) for security and abuse detection. Logs are rotated and not sold.
Cookies
No tracking cookies. We set none ourselves and none are required to use any tool. If third-party ads load (because an AdSense ID has been configured), those providers may set their own cookies — see Google’s AdSense policy for details.
Children
The site is not directed at children under 13. We do not knowingly collect information from anyone, let alone minors.
Contact
Questions about this policy can be sent through the contact page. We will respond.