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    You can find out more details about Clue's approach to privacy by reading our Privacy Policy

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    You can read more about how Clue handles and thinks about data in the following blog posts written by our founder and CEO, Ida Tin.

    The journey of a single data pointThe journey of a single data point, Part II: The underworld of digital advertisingThe journey of a single data point, Part III: About the selling of health data

Your Privacy

Our website uses cookies, which are small text files that are intended to make the site better for you to use, and that help us understand how people interact with our content so that we can make it better.

You can find out more details about Clue's approach to privacy by reading our Privacy Policy

Your Privacy

We use cookies on our website to analyze how people use it and improve the experience.

You can read more about how we use cookies in our Privacy Policy, or manage your preferences here.

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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Send yourself a link:

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

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Tips, remedies, and educational content based on science.

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

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10 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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Sign up for free:

You get more features with Clue Plus.

Enhanced Analysis gives you a detailed look at your period length, menstrual cycle length, and cycle variation, alerting you when anything is out of the normal range for your age and birth control type.

Forecast expands on Clue’s standard period, PMS and fertile window predictions to let you know when to expect anything you’ve tracked that has a cyclical pattern—cravings, energy levels, cramps and more.

Your subscription contributes to advancements in menstrual and reproductive health research that benefits people around the world.

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Discover Clue Plus:
FeaturesClueClue Plus
Period, PMS, and fertility predictions
30+ categories to track all your symptoms
Custom reminders
Science-based knowledge base
Help us push menstrual and reproductive health forward
Enhanced Analysis notifies you if anything is out of the normal range
Forecast tells you what symptoms are coming up
Support Clue

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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