Clue: Period & Cycle Tracker

Clue is a comprehensive cycle tracking app designed to help you understand your body at every stage. It combines period tracking, ovulation prediction, and pregnancy support with a science-based approach. The app is built by a women-led team and prioritizes data privacy under strict EU regulations, making it a trusted choice for millions worldwide.

Track your menstrual cycle with ease using the calendar view, which predicts your period and fertile days. Log over 200 symptoms, from mood and energy to sleep and sex drive, to uncover patterns and gain personalized insights. The ovulation calculator uses a clinically validated algorithm to identify your fertile window, and you can enhance accuracy by connecting wearable devices like Oura or Fitbit for temperature and heart rate data.

Beyond basic tracking, Clue offers expert-written guides on fertility, pregnancy, and perimenopause. The pregnancy tracker provides week-by-week guidance from certified nurse midwives, while the perimenopause mode helps you navigate hormonal changes. Smart pill reminders ensure you never miss a dose, and you can monitor how birth control affects your body.

With over 100 million users, Clue is more than a period tracker; it is a tool for body literacy and proactive health management. Whether you are trying to conceive, managing irregular cycles, or simply seeking deeper understanding, Clue adapts to your needs. Note that Clue is not intended as contraception; it is a companion for informed decisions.