Fertilax Description:

Fertilax is an application that enables you to calculate your most fertile
days. Enter the date of the first day of your last period, and the average
number of days from this date to the first day of your next period. Then
press NEXT and find out your most fertile days for the chosen month.
Please, pay attention that the calculation is only approximate. For more
details, please consult your doctor.
You have to install the MIDP Java Profile on your Palm before running
this application. It can be downloaded from sun for free at
http://java.sun.com/products/midp4palm/