Privacy Policy
Short version: the numbers stay in your browser.
Short version
The country preset, population, births, deaths and net migration are read by the script in this page and written back into the same page. Nothing is uploaded, stored or shared, and there is no account.
What happens to your inputs
- They stay in the page. The script reads the country selector and four number fields, runs a yearly loop and writes the result, charts and table into the same document.
- No upload. There is no request carrying the numbers. The projection works with the network disconnected once the page has loaded.
- No storage. Nothing is written to local storage, cookies or a database. Reload and the defaults return.
- No analytics of inputs. The page does not record which countries, populations or migration figures were selected.
Why the inputs can be sensitive
A small-area population combined with a year can identify a village or an institution. The arithmetic needs none of that context, so there is no reason to collect it. If you use the tool on a shared device, closing the tab is enough to remove the values from the page.
Browsers sometimes offer to remember form values as part of their own autofill. That is a browser feature outside this page's control, and it can be cleared in the browser's settings.
What the server sees
Like any website, the server receives the request for the page: URL, time, IP address and user agent. Those requests are used to serve pages and to count aggregate traffic. They do not contain the numbers you typed.
Third parties
The pages load no third-party scripts, fonts, images or embeds. There is no advertising network and no analytics service. The only requests are for this site's own stylesheet, script and icons.
Children
Nothing is collected, so there is nothing to collect from a child. The tool is an educational calculator, not a service directed at children.
Contact
Privacy questions can go through the contact link on the main site. There is no dedicated privacy mailbox for this tool cluster.