Well, it's official. There is now an iPhone App for everything, and I mean everything. For women trying to get pregnant or even just trying to track their cycles, you can use the free Menstrual Calender for iPhones. Simply add in the date of your period and dates when you have intercourse (totally optional) and get predictions for fertile days and even when your next period will be. Don't worry though, the display is discreet so a nosy eye will not know what they are looking at.