Clue Period & Ovulation Tracker is a science-packed health and menstrual cycle tracker designed to decode your entire cycle in every life stage – right from your first period, to hormonal changes, conception, pregnancy, and even perimenopause. Clue provides powerful insights into your body's unique rhythm and patterns, giving you deeper understanding of your menstrual cycle, mental health, PMS, and fertility with ovulation predictions and birth control tracking.

Your health data is always protected with Clue under the world’s strictest data privacy standards (the EU GDPR), ensuring you always have complete control.