About Sigastra: astrology that respects the sky.

Most people first meet astrology in a newspaper column, one paragraph for everyone born in the same month. It can be fun, but it isn't about you. We wanted anyone, in any of our languages, to start where a serious astrologer starts: with their own natal chart and a reading that follows it.

The best reaction we can hope for when someone first sees their chart is "that's me." Getting there takes exact astronomy and writing that is warm and specific.

Ask a general-purpose AI for your horoscope and it will often get the planets wrong or just talk about your Sun sign. Sigastra calculates the chart first, with the same ephemeris professional astrologers use, and only then explains it.

So we split the job in two. The engine calculates every placement, and only then does AI help write the interpretation from those numbers. The sky itself is never left to a language model.

1. Your birth moment. Your date, exact time and place of birth. Those three details fix the sky you were born under.

2. Real astronomy. We calculate your chart from the ephemeris, using the time zone rules your birthplace followed on that day.

3. Your reading. Readings written for your chart, in the language you choose.

Every chart uses high-precision ephemerides and historical time zone data, and every reading is available in 15 languages. Birth time matters more than people expect. It sets your Rising sign and the house cusps, and an old daylight saving rule can move them. We look up the time zone your city actually used on your birth date.

Sigastra is built and operated by Sigvanta LLC, a limited liability company registered in Wyoming, USA. We are a small team and we take privacy seriously. Your birth details are used to calculate your chart, payments go through Stripe, and only the chart data, never your name or email, is passed to the AI that helps write your reading.

Sigastra is built by Saša Ignjatović, founder and developer at Sigvanta LLC. He designed and wrote the calculation method: the ephemeris engine, the house systems, the historical time zones and the checks that keep every placement exact. He is the author of the method and the computation, not of the interpretations. LinkedIn

The interpretations you read are written by Sigastra’s AI from the chart the engine computed. No astrologer signs them. When a verified astrologer writes or reviews a reading, it carries their name, and only theirs.

Say what is what. Numbers are calculated. Interpretations are labeled as interpretations.

Insight without fear. Everything Sigastra writes is for reflection and entertainment. It is never medical, financial or legal advice, and it never tells you your fate is sealed.

Your language, your chart. Good astrology shouldn't be limited to English, so we write natively in 15 languages.