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Io Relationship – Interpreter

Relationship reports from any two charts

A highly revealing Chart Interpreter that produces synastry, composite, and relationship reports from any two charts.
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Io Relationship is the perfect tool for evaluating interpersonal relationships. Knowing how you’ll get along with others is the key to successful togetherness. Io Relationship highlights the strengths and weakness of any personal interaction, allowing you to see clearly both the possibilities and the pitfalls. Io Relationship – the interpreter for those who truly wish to know!


  • Comprehensive 18-20 page reports Shorter interpretation options available for when the exact time of birth is not known Multiple charts and tables, including bi-wheels
  • Graphic Design feature adds more aesthetic value to accompanying charts
  • Edit reports using the built-in text editor or any word processor
  • Export interpretations as text for use in other programs
  • Customizable page layouts (user-definable margins with individual selection of font types, sizes, and styles)
  • Prints an Introduction to Composites and Synastry charts
  • Export reports in HTML format
  • 10 House Systems with the choice of Tropical and Sidereal zodiacs (including 12 sidereal ayanamsas)
  • All Io Series programs also share several other features

John Townley is an astrologer, writer, recording artist, sound studio designer, and computer software designer. His books include The Composite Chart, Astrological Cycles and the Life Crisis Periods, Uranus, and Planets in Love.

Io Interpreters are Professional report software!

All programs include the automatic “Infinite Atlas” and the precision “Swiss Ephemeris”

Important Note to Professionals:

All software purchases include the individual license that permits you to sell the output you create using our software with no additional license or usage fees.