Period & Fertility calendar (com.zmobile.calendar) on Google Play
This application will let you quickly and easily check your menstruation phase and find out your fertility throughout the whole year! You will be able to calculate your next menstrual cycle days, find out your safe sex and high risk days, or good chance for pregnancy. Menstrual Fertility Calendar will become your closest friend, that will always stay with you. It is very easy to use and has a very intuitive user interface. All you need to do is set your individual duration of period cycle, pick the first day of your last menstruation and it is done!