Vol. 2 | What is Clue? The Origin of Period Tracking Apps and Femtech [Amina's Lens]

Feb 8, 2026
Amina’s Lens|Femtech & Period Tracking

Clue
Transforming "Just a Feeling" into Future Choices

Your period, flow, pain, mood, and overall condition.
Recording these small daily changes isn't about managing your body; it's about self-care that leaves future options open for yourself.

You can view the official Clue website, which we are introducing today, from here.

Visit the official Clue website
※You will be redirected to an external site. Please check the official website for the latest information on app availability, features, and terms of use.
Menstrual & Health Tracking An app that records daily changes such as period dates, flow, pain, and mood.
The Origin of Femtech A representative presence that spread the trend of supporting women's health issues with technology.
Awareness, Not Diagnosis A quiet tool to help you notice changes in your own body before medical intervention.
Amina's Perspective My personal experience of how records actually served as a basis for deciding to seek medical attention.

1|To us, who have left "just a feeling" behind

When did we start dismissing our periods and health as "just a feeling"?

I feel a little heavy.
I'm not in a good mood today.
I'm probably just tired.

In our busy lives, we've unconsciously learned to put off noticing small changes.

I was the same way.

2|Clue, a quiet tool

Clue is a menstrual and health tracking app born in Berlin, Germany.

It allows you to record daily changes such as period dates, flow, pain, mood, and overall condition with very simple operations.

Nothing special is needed

Just pay a little attention to your body. It's a quiet tool for looking back at your own rhythm later.

3|Before there was a word for it

This app was created by Ida Tin.

She is known for popularizing the term "Femtech" worldwide.

When Clue was born, women's health was not yet considered a subject for investment or technology.

As she traveled the world by bicycle, she felt that "if I knew my period and health, I could plan my trips and work schedules much better."

However, what investors told her was,

"What's the point of managing your period?"
"Is there really that much demand?"

This is what she was told.

Female × Technology — Femtech.

This word became the "translation" that conveyed her ideas to the world.

Left: Ida / Right: Amina (at Femtech Fes! 2024)

4|From feeling to record

What Clue changed was not functionality.

It was the distance to one's body.

  • It feels different somehow.
  • It feels a little different than usual.
  • But I can't quite explain it.

It added the option of "recording" to such vague sensations.

It doesn't diagnose, but it stands before medical care

Clue does not make medical judgments. However, daily records can serve as material for explaining your condition when needed.

5|The future doesn't arrive suddenly

Here's a story.

Clue collects data primarily related to periods and health from users worldwide. Of course, with the user's consent.

Through research using this big data, the possibility of finding signs of health changes or reasons to seek medical attention within daily records has become apparent.

It's not about predicting the future.
It's about being able to pick up on changes that are an extension of everyday life, without missing them.

6|Prevention was never taught

For women's health, there is often much that can be "prevented" or "noticed earlier."

Yet, many people don't go to a gynecologist until symptoms are clear or until their daily lives are affected.

This is not because we are indifferent.

What was never provided

I believe it's simply because the experiences of noticing, the opportunities to learn, and the supportive environments were mostly never provided.

7|The day data took me to the hospital

I myself have an unforgettable experience from using Clue.

Some time after childbirth, I experienced continuous irregular bleeding. At first, I thought it would settle down eventually.

But looking back at my records, both the amount and duration of bleeding were clearly different from usual.

Because the data was there, I could determine that "this is unusual."

When I showed the app to the doctor at the hospital and explained, they immediately understood the situation.

My own data recorded in Clue. The days with bleeding are shown in red, and the intensity of the color indicates the amount. I tracked the amount of bleeding using a menstrual cup.

8|Leaving choices for your future self

There are also period tracking apps in Japan.

However, the discussion on how to use "what comes after recording" may not yet be sufficient.

Clue stands between daily life and medical care, quietly offering information that can help you decide if "maybe I should go [to the doctor]."

"Measuring" is not about managing.
Nor is it about restricting yourself.

It's about leaving choices for your future self.

There isn't just one right answer.

But just having choices can bring us a little peace of mind.

Next time, another global option

There are many options around the world that haven't fully reached Japan yet.

Fermata will continue to introduce products and services, one by one, that support understanding your body, making your own choices, and connecting with medical care when needed.

This article is intended to provide information about menstrual and health management apps and femtech. Clue does not provide medical diagnosis or treatment. If you have concerns about your health, such as irregular bleeding, severe pain, or sudden changes in bleeding volume, please consult a medical professional.

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