Safe Days Calculator - Control is an iPhone application designed for women to determine the safe days in their menstrual cycle. To utilize this app effectively, users are required to input their Cycle Length, which is the number of days between periods, starting from the first day of the period until the day before the next period commences. The app boasts a user-friendly interface, making it intuitive and simple to navigate.

It is essential to note that this app is intended for reference purposes only. Users are strongly advised to consult with their healthcare provider before relying solely on the information provided by the app. The effectiveness of the method offered by the app is approximately 90%, necessitating careful consideration before use.