About Clue

Clue is a period tracking app, a trusted menstrual health resource, and a thought leader in femtech.

  • Download the Clue app on the App Store
  • Download the Clue app on the Play Store

By combining science and technology, we are actively changing the way people learn, access, and talk about menstrual and reproductive health around the world.

  • Download the Clue app on the App Store
  • Download the Clue app on the Play Store
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Clue Birth Control

Our FDA-cleared digital contraceptive.

Learn more
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a woman holding a smartphone
a woman holding a smartphone

Coming soon

to the US

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An image of two women sat at a breakfast table looking at a phone

12 million people in over 190 countries rely on our app.

Our content is science-based and written by reproductive healthcare clinicians and science writers to provide people with essential, evidence-based education about health, periods, and sex via helloclue.com.

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We strive to create an app that’s accessible to our diverse community of users, taking into account gender, age, race, ethnicity, accessibility, education, country of origin, socioeconomic status, and all the other aspects of an individual's background. Clue is currently available in 15 languages and growing.

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What is “femtech”?

One of Clue’s co-founders, Ida Tin, coined the term femtech in 2016 to define the group of technologies that are designed to support and advance women’s healthcare.

The technologies within this category include fertility solutions, period and fertility tracking apps, reproductive system health care, women’s sexual wellness products, pregnancy and nursing care, period care goods, at-home fertility monitoring devices and general healthcare.

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An image of Ida Tin; Co-founder and Chairwoman at Clue

Ida Tin, 

Co-founder & Chairwoman

Ida knew immediately that in order for these products to be taken seriously, the market needed to be defined, so she suggested that Clue should begin to call itself a femtech company.

By defining the group of products that are associated with female health, we are creating an entirely new category of technology. Grouping these technologies paves the way for femtech conferences and VC’s to invest in femtech and create even more products within this segment that are important and needed in the world.

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Mission

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

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Vision

No matter where they are from or how they identify, our vision is for people with cycles to live in tune with their biology, not in spite of it.

Values

Trust

We earn trust from our users by honoring their privacy, being transparent about how we use their data, and providing them with honest and accurate health information.

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Care

Care is at the core of everything we do, both in how we support and communicate with our users and in the products and technology we provide them with. We genuinely wish to help them improve their lives and live more fully.

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Science

Clue’s brand and products were born out of research and data. We continually strive to find the most accurate, forward-thinking information on menstrual and reproductive health, only sharing what we confidently believe in and can provide evidence for.

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Milestones

2012

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

2013

Clue app is launched on iOS

2014

Clue app is launched on Android

Clue raises a seed round of €500k

2015

Hit 3 million monthly active users

2016

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

2017

Clue Plus, our premium app version, is launched

Launched our #justsayperiod campaign

2018

Clue launches a new content website: helloclue.com

2019

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

2020

Launched Pregnancy Mode

Added Content tab to the app

Released Season 2 of podcast “Hormonal”

2021

Received FDA clearance for Clue Birth Control

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

Clue introduces a 4-day work week

4.8

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2M+ ratings

Why people love Clue

Lifechanging!!!

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

Nicole Layton

"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

New leadership - same vision

Clue is a widely loved and trusted menstrual health and wellbeing app. We now also work to the standards of a regulated medical device company - already in advance of launching Clue Birth Control, our forthcoming FDA-cleared digital contraceptive.

Clue is a widely loved and trusted menstrual health and wellbeing app. We now also work to the standards of a regulated medical device company - already in advance of launching Clue Birth Control, our forthcoming FDA-cleared digital contraceptive.
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We will continue to develop Clue in a human-centered way, creating a helpful, empathetic and intuitive user experience, and we will increasingly be working with regulators, civil society organizations, and reproductive health researchers to bring Clue to many more people around the world.

Carrie Walter (Clue’s former General Counsel) and Audrey Tsang (Clue’s former Chief Product Officer) are Clue's co-CEOs as of March 2021, covering these diverse areas with a collaborative leadership style that suits Clue and how they both love to work. Read more about Clue’s new leadership here.

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Carrie Walter & Audrey Tsang, Co-CEOs

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Audrey Tsang Co-CEO

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Carrie Walter Co-CEO

A photo of Antonia

Antonia Seffen VP of Finance

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Greg Ryzhov CTO

A photo of Sarah

Sarah Ottawa Head of People

A photo of Lynae

Lynae Brayboy Chief Medical Officer

A picture of Amanda

Amanda Shea Head of Science

We’re always working on something exciting.

Check out the links below to see what we've been up to.

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Clue Period Tracking App

Available on iOS and Android, the Clue app features cycle predictions, analyses, and educational content.

Read more here

Read more **here**
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Clue Encyclopedia

We create content around menstrual health, written and fact-checked by clinicians and science writers.

Read more here

Read more **here**
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Hormonal Podcast

A podcast about hormones and how they shape our world, hosted by Rhea Ramjohn.

Read more here

Read more **here**
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Clue webinars for clinicians

Our CMO, Dr. Lynae Brayboy, leads webinars for continuing education for clinicians.

Read more here

Read more **here**
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Clue Press

Our work and leadership has been praised by some of the world’s leading publications.

Read more here

Read more **here**
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Clue Privacy Policy

Data privacy is at the core of what we do: we never have, and never will, sell our users’ data.

Read more here

Read more **here**
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Clue Careers

Looking for a new role? Want to make a real change? Check out our vacancies, we’d love to hear from you.

Read more here

Read more **here**
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Clue Newsletter

Subscribe to our newsletter to get science-backed articles and our latest updates.

Clue Birth Control

Our FDA-cleared digital contraceptive.

Learn more
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a couple looking at a smartphone
a couple looking at a smartphone

Coming soon

to the US

Check out what goes on behind the scenes at Clue

About Clue

Clue is a menstrual tracking app, an encyclopedia, a resource for your health, and more. Here are all the posts...

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