Lilly Period and Ovulation Tracker helps you to track your cycle and can reliably predict your upcoming menstruation, fertile days and ovulation. Never get caught off guard by your period again. For a woman trying to conceive we have ovulation calculator that predicts your fertile window and helps you get pregnant faster. Even more you can enter daily notes and track PMS symptoms, moods and intercourse. Lilly learns from your inputs and makes better prediction of future periods and fertile windows through time, we use all up to date scientific methods available to track and plan your cycle. Using Lilly is easy, just tap a single button once a month on first day of your period and relax, Lilly will do all the heavy lifting for you.