The app calculates monthly periods, monthly ovulation and all the things you need to know about menstruation. It has a handy daily tracker, which allows you to easily record any observations. And if you want to know exactly what time of the month you are having your period or ovulation, it is for you. It is not only a convenient tool for women to determine if they are about to get their period. It is also useful for men. As some women are still using unreliable methods to determine when they are ovulating, men have more and more interest in this app.