Clue is an app in which women can collect information about their menstrual cycle and ovulation. The app functions as a diary, but also makes accurate predictions about upcoming cycles. Besides information about bleeding and fertility, information can also be collected about other factors that are connected to hormonal fluctuations, like food cravings, skin condition, sleeping patterns, sexual activity, and physical activity. The app provides insight into a personal health, and currently boasts over 11 million users world wide. By having insight into the menstrual cycle and the awareness of its effects, the user can take these into account and respond to them. She will know better what to expect and thus have a more pleasant experience.