Great for tracking and charting.

So easy to use. Extremely helpful if you are family planning to avoid pregnancy or are trying. Also, wonderful for tracking period lengths and heaviness/lightness of flow. Also, if you keep up with your entries it will automatically give you an EDD for the arrival of your baby! I highly recommend this app. I have had it since 2013 and wont switch to another one.

CMCoop about Lily - Fertility Calculator