Cast precisely
Swiss Ephemeris calculates the planets, angles, houses and aspects from your birth time and place.
Astrology with the working shown
Meet yourself beneath the numbers.
A precise birth chart, a warmer way into astrology, and conversations in ChatGPT that can always point back to the actual degree, house, or transit.
Free to cast. No birth time? We explain what becomes uncertain.
Today
Notice the closest applying contact first.
Three pieces, one clear thread
From a real sky to a useful conversation.
See what matters
Close contacts rise to the top, with the orb and applying or separating motion kept visible.
Talk in ChatGPT
Connect your account once. ChatGPT uses StarSync’s read-only tools and your existing ChatGPT allowance.
Less mystique, more curiosity
Ask “why are you saying that?”
The answer should name the technique and the numbers behind it. StarSync is for reflection and entertainment—not certainty, diagnosis, or professional advice.
Memberships
The Chart
Free
Your natal chart, beginner-friendly explanations, and the ChatGPT connection.
BeginStarlit
€19 / month
Calculated daily sky notes, chart archive, profiles and transit alerts.
Explore StarlitInner Circle
€490 / year
Quarterly calculation dossiers, priority features and a deeper personal archive.
View membership