About
About Birth Charts
What we do
Birth-Charts.app offers a free astrology compatibility calculator plus a celebrity birth chart database. We cover 2,000+ public figures with natal profiles, sun sign analysis, and zodiac compatibility across all 78 sign pairings — and a full two-chart calculator for personalised readings.
Our approach
Every compatibility report is grounded in Western astrological mechanics — elements, modalities, planetary rulerships, and aspects. We focus on specificity over generic flattery, so you get honest analysis of both strengths and challenges for each pairing.
Cosmic Compatibility app
For deeper chart-level analysis — full synastry reports, daily cosmic bond readings, and relationship timing — download our Cosmic Compatibility app on iOS and Android.
Contact
Questions or feedback? Reach us at help@birth-charts.app.