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Our mission is to help women and people with cycles understand their bodies better and take charge of their health.

Support our efforts!

What exactly am I supporting?

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Clue app

The ongoing development of the app, including features requested by you

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Funds important and under-researched studies in menstrual and reproductive health

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Data privacy

Keeps our data privacy standards high and policies in check

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Allows us to keep the Clue app accessible for anyone who needs it

Our trusted Partners

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Why now?

Clue has been around for six years, and since then, our community has grown to millions of users. That’s something we’re really proud of and we want to continue to be around for our users for as long as possible.

This also raises the questions:

How can Clue be a sustainable company?

What is best for the people who use Clue?

What kind of world do we want to help create?

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The answer was really clear. We wanted to build an app that’s supported by you and other users like you—not by selling your data, but by creating real value in your lives. We decided that the best way to do this would be to allow users to donate to us directly either via Paypal or supporting our efforts with a subscription to Clue Plus.


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2M+ ratings

Why people love Clue


"Accurate, informative, easy to use! The clean and fun design makes tracking your cycle, dare I say, fun?"

Nicole Layton

Amazing app

"Clue is such an invaluable app! As someone with PCOS and other health conditions that contribute to painful and irregular cycles, Clue has helped me to see patterns in my cycle."

Sophie Purdie

Best period tracker!

"This app is almost scary with how accurate it is in prediction of ovulation and menstruation times. I'd give 10 stars if I could."

Esther Mungai

Ways to support Clue

With your support you can help us achieve our goal of

Empowering women and people with cycles with the science, data, and technology needed to make informed choices about their lives.

This matters now more than ever before.

Donate on the web

You can set up:

a monthly recurring donation

or a one-off contribution.

The amount and frequency is up to you.

Subscribe to Clue Plus

If you already use the Clue app, subscribing to Clue Plus is also another way to support our mission and efforts.

Our premium plan offers several additional features—like seeing your future predicted cycles and getting a monthly Cycle Review email.

Subscribe now

Log into your Clue app and navigate to the More Menu to subscribe to Clue Plus.


Our mission is to empower women and people with cycles with the science, data, and technology needed to make informed choices about their life


Clue founded in Berlin by Ida Tin, Hans Raffauf, Moritz von Buttlar and Mike LaVigne


Clue app is launched on iOS


Clue app is launched on Android

Clue raises a seed round of €500k


Hit 3 million monthly active users


American College of Obstetrics and Gynecology (ACOG) rated Clue the number one period tracking app


Clue Plus, our premium app version, is launched

Launched our #justsayperiod campaign


Clue launches a new content website:


Clue launches its Irregular Cycles feature, helping users identify symptoms of PCOS

Clue launches its first season of Hormonal podcast on iTunes, Spotify, and SoundCloud


Launched Pregnancy Mode

Added Content tab to the app

Released Season 2 of podcast “Hormonal”


Received FDA clearance for Clue Birth Control

Audrey Tsang and Carrie Walter become Clue’s co-CEOs

Clue introduces a 4-day work week


monthly active users


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Recent updates