Ovulation Calculator Calendar is a lifestyle application available for iPhone. Developed by Dang Phan, this free app is designed to estimate when a woman will ovulate based on the date of her last menstrual cycle and the average number of days between periods. It provides estimations based on the woman's last period date, but it should not be used as a form of birth control.

The Ovulation Calculator Calendar is a user-friendly and intuitive app that is simple to use. With just a few inputs, users can quickly obtain information regarding their ovulation cycle. However, it is important to note that this app is for reference only, and it is recommended to seek a doctor's advice in addition to using this application before making any medical decisions.