A free app for Android, by Tadtech.

A pregnancy and ovulation calculator is a useful tool for those who are planning to have children. It calculates the time of ovulation and the fertile period, which is the time when you can have a child. This is a companion application, you can use it as a pregnancy calendar and ovulation tracker.

It is a simple and easy-to-use application. You just need to input the first date of your last menstrual period and the average number of days in your menstrual cycle. The result will be the ovulation date and the fertile period. You can use this application for tracking your menstrual cycle. It also tells you when you are to expect your next period, so you will not be surprised if you are pregnant.