CartoStar: the AI app that maps your birth chart onto the Earth

Working note for Bailey before this goes anywhere: your brief called this "the AI tarot app," but CartoStar is not a tarot app. It is an astrocartography app, which means it maps your birth chart's planetary lines across a globe to show where on Earth you might thrive. Everything below is drafted around what the app is. Title and framing may need your sign-off. [VERIFY with Bailey: whether we keep an astrocartography angle or you were thinking of a different, tarot-based app entirely.]

If you have ever wanted to know why one city lights you up and another leaves you flat, astrocartography is the corner of astrology that answers that. CartoStar is a new app that puts it in your pocket. It calculates the planetary lines of your birth chart and lays them across an interactive 3D globe.

What is CartoStar?

What does CartoStar do?

CartoStar is an AI-powered astrocartography and relocation astrology app. You enter your birth details once, and it maps your planetary lines across the Earth on an interactive 3D globe, then scores cities against your chart for things like love, career, home, and spiritual growth.

Who built it?

Sri Harsha Seethalam, a full-stack engineer who built the whole thing himself over about a year. He has a master's in computer science from Vanderbilt, spent years shipping production software in Nashville, and now runs his own software studio, TeamChai. CartoStar launched on iOS and the web, and it is available on iPhone, iPad, Mac, and Apple Vision.

Is it tarot?

No. Tarot is not part of CartoStar. It is built around astrocartography, the relocation astrology system popularized by Jim Lewis in the 1970s, where each planet's position at your birth draws a line across the map. Astrologers have worked with these lines for decades, mostly with clunky desktop software. CartoStar's pitch is that the same work can happen on your phone in minutes.

Where the technology sits in the practice

Here is what I find interesting about CartoStar, and why it earns a spot in a conversation about technology and esoteric practice. The app does not pretend to replace an astrologer.

For one thing, it is built to a professional standard. It supports both Western tropical and Vedic sidereal astrology, eight house systems including Placidus and Whole Sign, and advanced chart work like parans, local space lines, aspect lines, and zenith points. Seethalam has talked publicly about the engineering underneath: comparing ephemeris sources, doing true spherical geometry instead of flat-map approximations, and building his Scout engine to score cities by continuous influence rather than arbitrary cutoffs. This is someone treating the math of astrology with respect, not wallpapering a horoscope widget with AI text.

For another, the AI part is positioned as an interpretive layer, not an oracle. The app offers AI chat interpretations for each planetary line and location, grounded in your specific chart. And notably, it does not stop you there. CartoStar lets you book one-on-one astrocartography consultations with a human astrologer through its own scheduling tools, export PDF reports you could take into a session, and share interactive map links. The tool hands you better questions and cleaner math; the meaning-making still belongs to you or to a practitioner you choose.

That is the frame worth holding onto as AI shows up everywhere in this space: does the tool send you deeper into the practice, or does it sell you a shortcut out of it? CartoStar, at least by design, points inward and onward.

What can you do in the app?

Map your planetary lines on a 3D globe, with every planet from the Sun through Pluto
Rank cities with the Scout engine for themes like love, career, finances, creativity, and spiritual growth
Run compatibility mode to compare two charts and find places that work for both of you
Switch between Western and Vedic settings, with sidereal options and ayanamsa choices
Get AI interpretations for each line and location, then book a human consultation if you want a real reading

Who is it for?

The store listing is candid about its audience: digital nomads and expats choosing where to live next, travelers planning trips aligned with their chart, couples looking at relocation together, and astrology students and professionals who work with astrocartography. The professional-grade mapping features make it clear the app wants to be taken seriously by working astrologers, not just by people shopping for a fun screen.

Does it cost anything?

There is a free Explorer tier. A Pro subscription runs $59.99 a year, a Duo tier is $79.99 a year, and there is a $199 lifetime option. The free tier is enough to see whether the app speaks your language before you spend anything.

The honest question underneath

Apps like this raise a fair question for practitioners: does AI interpretation cheapen the craft? I think the better question is who the AI answers to. A tool that hands a client a polished reading with no human in the loop flattens the practice into content. A tool that does the heavy math, teaches you what a Venus line means, and then connects you to a working astrologer strengthens the whole chain. CartoStar mostly does the second, and that is why it is worth watching.

The esoteric world has always borrowed its era's best instruments. Astrologers once moved to printed ephemeris tables and then to software, and each shift got called the end of something. This is that shift again, happening on a glass rectangle. What survives is the same thing that always survives: the practitioner's judgment, the client's trust, and the slow human work of meaning.