The app collects no personal data. Visits are counted anonymously with Plausible, without cookies and without any way of telling who you are, so we know how much the app is used.
If you choose a language, the choice is stored in a cookie. The ferry landing you last chose, and the one last nearest to you, are remembered the same way, so the app opens on the right landing. These cookies are used for nothing else.
If you let the app use your location, it is used only on your device, to find the nearest ferry landing and show you on the map. Your location itself is not stored or passed on.