The STI Risks Calculator is an educational reference. The choices you make in the calculator, such as country, activity, and history, are processed entirely in your browser. They are never sent to a server, stored remotely, or shared.
Every page view sends one anonymous count to our own server, whatever you choose in the cookie banner. It records which choice was in effect (accepted, necessary only, or not decided yet) and whether the banner was showing. Clicking a banner button sends one more count, recording which button. Nothing else is sent. It tells us how much of our traffic the analytics below can't see, so a quiet week and a blocked week don't look the same. The count carries no identifier, no page address and no cookie, and it is stored only as running totals per hour, so it can't be traced back to you.
We do this on the basis of our legitimate interest in knowing how complete our analytics is. Nothing is stored on your device for it. Your IP address reaches our hosting providers the way it does for any web request; it is used only to deliver the count and is not stored with it.
With your consent, we use PostHog (hosted in the EU) to measure page-level usage (which pages are viewed) so we can improve the tool. PostHog runs as its own dedicated project for this site. Analytics is strictly page-level: it never captures your calculator inputs. Without your consent, no analytics cookies are stored. Apart from the providers that host this site, PostHog is the only third party that processes any data for it.
On your first visit a banner lets you accept all cookies or keep only the necessary ones. Analytics cookies are set only after you consent; if you decline or later withdraw consent, those cookies are removed where technically possible. You can change your choice at any time: