This page will generate biorhythm charts for two people and compare the phase relationship of the rhythms as a compatibility index. You can also put in a single birthday to just get a chart for one person. A database of famous people throughout history is available to supply one or both of the birth dates for comparison. Alternatively, you may supply one or both of the dates for comparison yourself.
Here you can find a more complete explanation of what biorhythms are.
If you would like to see a particular celebrity added, why not drop us a line?