Astrocalc 6.2 Synastry Edition

The Synastry Edition includes everything from the Beginner and Basic editions and furthermore deals with different techniques to compare 2 or more charts with each other including Direct Chart Comparison, Composite Chart and Relationship Chart, the latter sometimes also called Davidson Chart. Also includes the Trigo method which is excellent for choosing your ideal partner.

It does Bi-Whels and readable Tri-Wheels and list planets in the other persons houses and more.

Direct Chart Comparison enables input of 2 charts and subsequent comparison giving the aspects between the charts and planets in houses of other chart. Allows you to input up to 12 charts at any one time and select any 2 for comparison. Also includes the Trigo method which is excellent for choosing your ideal partner.

Composite Chart calculates the midpoints between 2 charts and the inter-aspects for the natal chart (and progressed charts if calculated). The method used derives the Ascendant from the latitude where the relationship/event is deemed to have taken place. Up to 12 charts can be used to form multiple composite charts and you also have a Midpoint Composite option which calculates a chart based on the Midpoints of all the planets/points involved, not just the Ascendant.

Relationship Chart calculates a new chart and interaspects, but this time using the midpoints in time and space. Thus if the latitude of the 2 charts are 60 N and 40 N, then the new chart would be calculated for 50 N. Similarly with the longitude, time and date of birth. Can work with up to 12 charts.

Now also includes interpretation Text for Direct Comparison between 2 charts, as well as for Transits and Natal Charts. The latter can easily be adjusted and adopted for use with Composite charts

The best way to find out if this is what you are looking for is to download a 30 days trial version and take it for a ride.

Compatible with Windows 7, Vista and XP