The Clearblue Period & Cycle Tracker is a free iPhone application designed to help users monitor their menstrual cycles. It allows for manual logging of periods, ovulation test results, and various symptoms throughout the cycle. The app functions seamlessly with Clearblue Advanced Digital and Digital Ovulation Tests, providing users with insights into their peak fertility days based on hormonal changes. Even without using ovulation tests, the app offers extensive features to educate users about their cycles and track their symptoms effectively.

One of the standout features of the Clearblue Period & Cycle Tracker is its ability to predict peak fertility days and period due dates based on individual cycle lengths. Users can view a comprehensive overview of their cycles and understand how their fertility probability compares to others with similar cycle lengths. The app prioritizes user privacy by not requiring account creation and ensuring that personal data is not shared or sold to third parties.