Contact
Reach Marko Visic (MPharm, BSc Physics) directly. Corrections, source suggestions, feature requests, and press enquiries all go to the same address.
Aim to reply within two working days. If your message is time-critical (a broken calculation, a wrong number quoted somewhere) please say so in the subject line.
Corrections
If a number on the site doesn’t reconcile, include the URL you saw it on, the value shown, and the value you expected — the fastest fix path. Corrections are the single most useful thing you can send; every one gets checked against the underlying formulas and the data-sources registry before shipping.
Source suggestions
If you know of a verified primary source for something the site currently marks as a gap (population inside a radius, drive-time isochrones, city boundary comparisons), send the link. A credible primary + a working retrieval URL is enough to move an entry from candidate to verified in the registry.
Press
For coverage, licensing (embed the tool, cite computed values with attribution), or interviews, email the same address with Press: in the subject line. Author bio and credentials on the About page.