9 Downloadable mobile applications for providing a monthly calendar telling the chance of menstruation, fertility, ovulation, moods, symptoms, and odds of conceiving for natural family planning; Downloadable mobile application for tracking the first day of menstruation and monitoring the menstrual cycle for ovulation, fertility, moods, symptoms, and intimacy for natural family planning; Downloadable mobile applications for providing reminders for periods and odds of conceiving. Downloadable mobile applications for recording user's cervical mucus, intimacy, symptoms, or moods; Downloadable mobile applications for guiding natural family planning. Downloadable mobile applications for providing educational information about menstrual health, menstrual cycles, and fertility to plan or avoid pregnancy