Genius Loci
Place-based astrology, in the works.
The chart you were born with does not only describe a moment in time. Projected onto the globe, it draws lines: the meridians and horizons where each planet stood at your birth. Where those lines cross a place, that place carries the planet's character for you.
Genius Loci will draw those lines on a map, cast a relocated chart for any place you pick, and show a local space chart from where you stand. It uses the same birth data and the same ephemeris as the rest of the app.
It is not in the app yet. In the meantime, the natal chart it will be built on is.