OvaGraph is an official fertility app for the popular fertility book, Taking Charge of Your Fertility (TCOYF). The app allows users to store and graph their menstrual cycle data in a convenient, organized way. Users can add their daily basal body temperature (BBT), daily cervical fluid, and other variables, such as their mood, temperature, weight, etc. The app can also connect users with an active community of other women trying to get pregnant, which offers them support and encouragement, as well as informative resources. 

The OvaGraph fertility calendar app employs the Fertility Awareness Method (FAM), which was developed by the fertility doctor and researcher, Toni Weschler. FAM is a unique, scientifically-proven method that utilizes the two main signs of the menstrual cycle: basal body temperature (BBT) and cervical fluid.