About XiNiS
What is XiNiS
A free astrology calculator built on Swiss Ephemeris. Arc-second precision, 10 house systems, aspect pattern detection, transits, progressions, solar and lunar returns, fixed stars. No account needed, no tracking.
I built it because I wanted something reliable for my own use. Then figured others might find it useful too.
Technology
Swiss Ephemeris
Professional astronomical engine
FastAPI + Python
Calculation backend
Astro + React
Frontend with interactive components
Tailwind CSS
Custom dark theme
XiNiS AI
A separate service that interprets your chart through Jungian analytical psychology. It maps planetary archetypes onto your birth chart to reveal individuation paths, relationship dynamics, and unconscious patterns. Available as a Telegram Mini App, independent from the free calculator.
XiNiS AI is currently offline while the AI engine is being rebuilt from the ground up. The free calculator is not affected.
Open Source
The calculation engine is open source. Backend code, Swiss Ephemeris integration, and all astronomical algorithms are on GitHub.
View on GitHub