What MySkyChart is
MySkyChart is a birth chart calculator and AI reading service designed for beginners. The astronomy underneath is the same engine professionals use: Swiss Ephemeris computes every planetary position, house cusp, angle, and aspect in your chart deterministically, to the arcminute. On top of those computed placements, an AI astrologer writes readings in plain English — no jargon walls, no assuming you already know what a trine is.
That combination is the whole idea. Plenty of sites can calculate an accurate chart, and plenty of books can explain astrology in general. We built MySkyChart for the gap in between: understanding what your specific placements mean, explained clearly, grounded in the actual math. If you want the full technical detail of how we calculate, our accuracy and methodology page documents every choice — zodiac, house systems, orbs, time zone handling — and publishes verifiable results.
We are also honest about what we are not. We are not a professional astrology research platform, we do not claim our interpretations are the final word on your chart, and we do not dress up entertainment as clinical certainty. The math is exact; the meaning is yours to weigh. That distinction runs through everything on this page.
How interpretations are built
Our readings are generated by a structured LLM pipeline, not a single free-form prompt. The pipeline starts from your computed chart data — the exact placements, houses, and aspects Swiss Ephemeris produced — and generates interpretation text grounded in those placements. Validation and guard layers check the output before you see it, so the reading stays tied to what is actually in your chart.
The boundary is strict: the AI writes prose about placements it is given. It never calculates a position, never adjusts one, and never invents one. If a reading mentions your Moon sign, that sign came from the ephemeris, not from the language model. Users rate readings after receiving them, and those ratings feed our ongoing quality work.
Your data, in plain words
We try to keep this simple and honest. Here is what happens with your information:
- Your birth data (date, time, place) is stored so we can render your charts when you come back.
- Your chart data is sent to our AI provider (OpenAI) to generate readings — that is how the interpretation text is produced.
- Readings can be rated by users; we use those ratings to improve quality.
- For account questions or data requests, contact support@myskychart.com [VERIFY EMAIL].
Why accuracy comes first
An AI reading is only as good as the chart underneath it. That is why we document our methodology publicly — zodiac, house systems, node choice, orbs, time zone handling, geocoding, and how we treat unknown birth times — and publish computed charts for well-known people with recorded birth times, so anyone can verify our numbers against any professional calculator. We would rather earn trust by showing our work than by asking you to take our word for it.
What astrology is for — and what it isn't
We want to be clear about what you are getting. Astrology, as we offer it, is a tool for self-reflection and entertainment: a structured vocabulary for thinking about yourself, your patterns, and your relationships. Many people find that genuinely valuable. But a birth chart is not a diagnosis, a forecast of fixed events, or a substitute for professional judgment.
Specifically: nothing on MySkyChart is medical, financial, or legal advice. Our readings do not make deterministic predictions about your future, and no reading should be the basis for a health decision, an investment, or a legal matter — for those, talk to a qualified professional. The calculations are real astronomy and the interpretations are carefully generated, but what you do with the insight is yours, and the big decisions in your life deserve more than any chart, from us or anyone else.
Frequently asked questions
How do I delete my data?
Contact support@myskychart.com and we will handle your deletion request. We'll be honest: one-click account deletion is on our roadmap but does not exist yet, so for now deletion goes through support.
Is my chart data used to train AI models?
We use OpenAI's API to generate readings. Per OpenAI's API terms, API data is not used to train their models [VERIFY BEFORE PUBLISH]. We do not sell your birth data.
Who writes the readings?
Readings are generated by an AI pipeline grounded in your computed chart placements, with validation layers checking the output. The underlying positions are calculated by Swiss Ephemeris — the AI explains the math; it never does the math.
Is MySkyChart free?
You can calculate a full birth chart and get a free Light reading without an account or credit card. Paid tiers (Full and Expert readings) add deeper, longer interpretations.
What does your own chart say?
Calculate your full natal chart in seconds — exact planet positions, houses, and aspects, with a free AI-powered reading to start.
Create your free birth chart