Press a button at the start of your period every month. Period Tracker logs your dates and calculates the average of your past three months' menstrual cycles to predict the start date of your next period. View your current and future period dates, ovulation and fertile days, your moods and your symptoms in a simple month-view calendar. Decorate your iPhone with an icon that looks great on your home screen and that's discreet. It reads simply "P Tracker."
iPhone OS 3.x
||Requires iPhone OS 3.0