Period Tracker - Ovulation Calendar is an Android app designed by PrivatePeriodTracker.LLC. It is a smart menstrual cycle tracker that helps women record their cycle duration and menstrual days, forecast their period days, and calculate ovulation and fertility days. The app provides an intimate reminder to help women lead a safe, healthy, and confident life.

One of the main features of the app is the ability to select menstrual cycle days and period start date, and then track the last and next period dates. It also forecasts ovulation, fertile, and safe days in the calendar and allows you to adjust your period date if you have an irregular menstruation. The app provides a warm note on the homepage about the next period coming days and estimated period start date.

The app also allows you to log your body temperature, weight, mood, and symptoms like a diary to get an improved period prediction. It predicts your chances of getting pregnant and notes you about ovulation and peaks in your fertility, and also includes a private intimacy tracker. Moreover, the app provides medical knowledge about menstrual periods and allows you to open or close period reminders on different dates, including start day, end day, dangerous period, safe days, ovulation day, and more.