I built [Astrocartography AI](https://astrocarto.net), a web app that generates astrocartography maps from a birth date, birth time, and birth place. It plots planetary AS / DS / MC / IC lines on an interactive world map so people can compare places for moving, working, traveling, or just exploring why one city feels different from another.
I built it because most astrocartography tools I tried felt hard for first-time users. Many have older interfaces, produce mostly static charts, or assume you already know how to interpret the lines. I wanted to make something that is easier to try and easier to understand without having to learn a lot before getting a useful result.
The core chart works without signup. You can enter a city name or raw latitude/longitude, generate the map, and then ask follow-up questions about specific cities. I also added an AI reading layer, mainly to turn the chart into practical comparisons instead of leaving users alone with a map full of lines.
I know astrocartography itself is a niche topic and not everyone here will care about the premise. The part I found most interesting as a builder was turning a specialized chart format into something interactive, privacy-friendly, and understandable enough for non-experts to actually use.
Technically, it is built with Next.js 16, React 19, Leaflet, OpenStreetMap/Nominatim, and Swiss Ephemeris. The astrocartography calculation runs on the server instead of embedding a third-party widget. I also tried to keep the flow lightweight: birth data is used for the calculation and not stored permanently as part of the chart generation flow.
I would especially love feedback on two things: whether the map and explanations make sense if you know nothing about astrocartography, and whether the no-signup flow is enough to make the product easy to try.
Thanks.