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Privacy policy

Last updated:

The short version

The numbers you type into a calculator are processed in your browser and are not sent to us. We do not use advertising or tracking cookies, and we do not sell personal data.

Information we receive

  • Site statistics: we use Cloudflare Web Analytics to count page views and measure page speed. It does not use cookies or local storage and gives us aggregate figures, not profiles of individual visitors.
  • Hosting and security: our site is delivered by Cloudflare. To deliver pages and protect the site, Cloudflare processes technical data such as your IP address, browser type and the pages requested.
  • Email: if you write to us, we receive your email address and message and use them only to reply and to fix any issue you report.

How long we keep it

We keep emails for as long as needed to handle your message and any follow-up, then delete them. Analytics data is held in aggregate form by our analytics provider.

Who we share it with

Only the service providers that run the site (Cloudflare for hosting, security and analytics; our email provider for messages), and authorities where the law requires it.

Your choices and rights

Depending on where you live, you may have the right to ask what personal data we hold about you, to correct it or to have it deleted. Write to us through the contact page.

Changes

If we add a service that changes how data is used, such as advertising, we will update this page and its date before the change takes effect, and ask for consent where the law requires it.