The Fertility Calculator or Menstruation and Ovulation Calendar application helps couples who are on a program to get pregnant quickly or have a baby. This fertility calendar application is based on a formula for calculating the fertile period that has been medically proven. How to calculate a woman's fertile period to get pregnant quickly requires two data, namely HPHT data (First Day of Last Menstruation) and Menstrual Cycle. This application for calculating the fertile period is quite accurate and successful, and there is no need to open the calendar anymore. The complete fertility calculator application also has a HPHT calculator function, menstrual calendar, and so on.