Astrology Chart Calculator in Swift

Develop a framework in Swift (for use in iOS, macOS and iPadOS) that is capable of calculating the astrological position of the following planets/stars: Sun, Moon, True Node of Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto and Chiron.

Input: UTC Timestamp, Planet/Star - Output: Position in degrees in the chart (value in degrees only, no graphical representation)

I used to use SwissEph for this, but due to licensing restrictions I have to avoid it.

If you have specific questions please let me know.