iFertile is a free iPhone application developed by FBF Sistemas in the Lifestyle category, specifically under Health & Fitness. The program provides a simple and convenient way to estimate the fertile period of a woman using the rhythm method.

The rhythm method, also known as the calendar method, is a contraceptive method that relies on calculations to estimate the fertile period of a woman. While it can be used as a contraceptive method, it is not considered very secure. However, iFertile is most suitable for women who want to become pregnant and need to know their fertile period.

With iFertile, users can easily input their menstrual cycle data, and the program will calculate and display the estimated fertile period. This information can be helpful for women who are trying to conceive. The app provides a straightforward and accessible way to track and monitor fertility.

Overall, iFertile is a useful tool for women who want to estimate their fertile period and increase their chances of getting pregnant. However, it is important to note that the rhythm method may not be the most reliable contraceptive method, and users should consult with healthcare professionals for more accurate and secure options.