Legal
Privacy Policy
What information this site collects, how it is used, and the choices you have.
By Sandeep · Updated November 2026
The Short Version
The dates and values you type into our calculators are processed in your browser and are not sent to us or stored on our servers. We collect only limited, standard website data, described below.
Information We Collect
- Calculator inputs: not collected. Birth dates, test dates and blood test values stay on your device.
- Usage data: like most websites, we may use analytics to see which pages are visited, roughly where visitors come from and what device they use. This data is aggregated and not used to identify you.
- Messages you send us: if you email us, we keep your email address and message only to reply to you.
Cookies
We may use cookies for analytics and, if the site shows advertising, for ads. Advertising partners, such as Google, may use cookies to show ads based on your visits to this and other websites. You can control cookies in your browser settings and, where required, through our cookie banner. You can opt out of personalized Google ads at Google’s Ads Settings.
How We Use Information
- To keep the site working and secure
- To understand which tools are useful and improve them
- To reply to your messages
We do not sell your personal information.
Children’s Privacy
This site is written for adults, including parents and professionals. We do not knowingly collect personal information from children under 13. Information about a child that you enter into a calculator stays in your browser.
Your Rights
Depending on where you live, such as the EU, UK or California, you may have the right to access, correct or delete personal information we hold about you, or to object to its use. To make a request, contact us using the details on our contact page.
Changes to This Policy
We may update this policy from time to time. The date at the top shows when it was last updated.