Compatibility calculator
Two charts meet, and each one changes the other.
The calculator puts two births side by side: the Day Masters, the spouse star, the spouse palace, the animals, and each pillar of one chart against each pillar of the other.
Enter both births. The score adds the relations that hold, and its method shows under it.
Time zone rules before 1970 can be wrong for some places.
City data: GeoNames, CC BY 4.0