Last updated: 2026-10-26
Birth data
The calculator runs entirely in your web browser. The date, time, place and gender you enter are processed on your device and are not transmitted to us or to anyone else. If you use the share link, those details are placed in the part of the address after the “#” sign, which browsers do not send to web servers; anyone you send the link to can see them.
City list
When you start typing a birthplace, your browser downloads our static list of cities. The download is the same for everyone and does not include anything you typed.
Server logs
The site is served as static files by a content-delivery network, which, like any web server, processes technical data such as IP addresses and browser type in order to deliver pages and protect against abuse. We do not use these logs to identify visitors.
Cookies, analytics and advertising
At present the site sets no cookies and runs no analytics or advertising scripts. If we add privacy-friendly analytics or advertising in future, we will update this page before doing so and, where the law requires it, ask for your consent.
Contact
Questions about privacy: [email protected].