For couples who prefer to use APPS for use on an iPhone, Android or iPad, here are some options for you!
Another highly rated online charting system developed by WOOMB is Fertility Pinpoint™
There are a variety of charting websites and apps available, with new ones emerging all the time. Many cannot be used to keep an accurate Billings Ovulation Method® chart. The site or app may restrict users to a limited number of predetermined sensation and/or mucus descriptions. Some apps classify mucus as fertile or infertile in a way that contradicts the research on cervical mucus that is the foundation for the Billings Ovulation Method®.