The app to track your period, and so much more.

Scientific and straightforward—the period tracker app that teaches you about your body

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Clue predicts your period, PMS, and fertility.

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Get period, PMS, and fertile window predictions based on the most up-to-date science

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See all your tracked data in the Calendar and an overview in Analysis

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Get more accurate predictions every time you track

There's more to your period.

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Great skin when you ovulate? Headaches during PMS? Learn about your personal patterns with 30+ tracking options: birth control, cramps, emotions, skin, hair, sleep, sex, pain, moods, cervical fluid, and more

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Enhanced iOS features, including reproductive health integration with the Health app, Touch ID and Today Extensions

Predictions and analysis unique to you and your body.

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Set up custom notifications to remind you when your period is coming, and more

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Learn more about why your cycle may be considered irregular or regular

Tips, remedies, and educational content based on science.

In-depth information about the menstrual cycle, complete with medical and scientific references


over 2M+ ratings

12 million people trust us with their data.

Import, export, or delete your health data at any time. Clue keeps your private health information safe and secure. Never lose access to your tracking history, by creating a Clue account or saving backups to your email or online storage.

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What Clue users have to say

A quotemark

It gives me freedom, it takes pressure off me. I don’t need to keep my cycle in mind, Clue just does it for me and I never have to calculate and think about it, I can just check the app.

— Majken

A quotemark

Everyone should use this and I wish I'd known about it sooner, especially when I was just starting to figure this out. The predictive calendars are just as helpful as the science-backed info that I receive through the app, email, and social media. Clue tells me about my personal health and how my body works in an open, accepting, informative, non-clinical way.

— Jane

A quotemark

I like the streamlined look of the app, the tags feature for things specific to me, 80% of the other inputs you can add, and the fact that it’s gender neutral.

— Jess

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