Ovulation Calculator Fertile Tracker Calendar OC is a free application developed by Ovulation Calculator Pty Ltd for iPhone users. The app aims to help couples conceive up to 3x faster than the national average. It calculates the two most fertile days of each cycle by analyzing the user's menstrual cycle, health, and lifestyle data.

The app offers a lot of fertility knowledge through its education portal and access to an online-support network of thousands of other women trying to conceive. The Ovulation Calculator app is easy to use with features such as cycle data analysis driven predictions, ovulation calculator, ovulation calendar, fertile window and conception odds viewer, fertility and BBT chart, cycle reports, daily insights, fertility tips, alerts, and reminders. Moreover, the app allows easy cycle data logging and fast period logging.

The app has received positive reviews from users who found it helpful and informative. The app has a daily progress log to record daily signals such as BBT, cervical mucus, cervix position, OPK results, symptoms, mood, and more. The period log allows users to add their periods and flow type in one place. The fertility charting provides clues and insights into the user's cycle and fertility. The app is available for free download.