Privacy policy

Short version: the numbers you type stay on your device.

Last updated November 11, 2026

What you enter into the calculators

Every calculator on Little Numbers runs entirely in your browser. Dates, weights, cycle lengths and anything else you type are never sent to us, never stored on a server and never saved after you close the page. We have no account system and never ask for your name or email.

Information collected automatically

Like most websites, our hosting provider may automatically record basic technical information when you visit, such as your IP address, browser type and the page you requested. This is used only to deliver the site and keep it secure, and we do not use it to identify you.

Cookies

Little Numbers does not set cookies and does not show ads.

Analytics

We use Cloudflare Web Analytics to count page visits, so we can see which calculators are useful and whether the site is loading quickly. It does not use cookies, does not store anything in your browser and does not follow you across other websites. It records general information such as the page visited, the site you came from, your browser type and your country. It never sees anything you type into a calculator. You can read more in Cloudflare's description of the service.

Links to other websites

Our pages may link to other websites. Their privacy practices are their own, so please review their policies.

Children

Little Numbers is written for parents and parents-to-be. It is not directed at children, and we do not knowingly collect personal information from anyone.

Changes to this policy

If we change how the site works, for example by adding features that use cookies, we will update this page and the date above.

Contact

Questions about this policy? Email frezer@liosrm.com.