Synastry: Personalized Astrology for Your Birth Chart The Synastry app analyzes your astrological birth chart and calculates the planetary aspects at the current moment. It notifies you of new transits affecting you, explains their meanings, and provides information about their duration. Important Note: Synastry is designed for users familiar with astrology and planetary aspects. It does not offer generalized predictions for your zodiac sign on a monthly or weekly basis. Instead, it provides a