Female fertility is characterized by being cyclical. The fertility tracker app is a simple and effective tool to recognize a woman's fertile and infertile periods through natural body signals that she can detect in each period. It can be used by women with regular, irregular, anovulatory cycles, during lactation and premenopause. Helps when there are infertility problems. It is used to find and space pregnancy or simply to know female reproductive health. Used together with your partner, it helps promote dialogue and emotional communication. To obtain good efficiency indicators in fertility registration, it is essential that the user be instructed by a trained instructor.