What's the best iOS app for tracking menstrual cycles to aid in conception and pregnancy planning?

Flo Cycle & Period Tracker is a comprehensive iOS application focused on menstrual cycle monitoring and reproductive health. It stands out for its precision in predicting ovulation and fertile windows, which is crucial for individuals trying to conceive. The app includes features like daily personalized tips based on cycle phases, symptom logging for physical and emotional changes, and a transition mode for pregnancy tracking with week-by-week updates. Real-world use cases involve users logging data to identify optimal conception times or monitoring health during pregnancy, with reviews indicating high satisfaction for its accuracy and community support. For example, one user mentioned using it successfully for conception and pregnancy management. However, some limitations exist, such as the inability to add custom symptoms, which a few reviews note as a drawback for personalized tracking. Despite this, the app's robust algorithm, educational content, and active forum for sharing experiences make it a reliable tool. The free version offers substantial functionality, while premium options provide deeper analytics, catering to diverse needs in reproductive health.