Sabab〈サバブ〉

From a distant star,
to your heart.

A space for your worries and your quiet thoughts alike.
A new kind of experience that gently untangles your heart — and makes everyday life a little lighter.

A yellow sabagem.
STORY 01

A Planet Losing Its Emotions

Two cartoon creatures look sad at a pile of scattered black cubes on the ground.

Far away in the Andromeda Galaxy lies Planet Barbu, home to an advanced civilization. Technology had reached incredible heights, and society was built around efficiency and logic.

Deep inside the planet rests the , a miraculous crystal that shines by feeding on many different emotions. It is the source of all energy on Planet Berb.

But over time, the people of Barbu began to push away emotional ups and downs, seeing them as unnecessary and inefficient. As they slowly let go of their feelings, the Saba Gem lost its glow.

Planet Barbu fell into a serious energy crisis. Even now, the planet is fighting for survival.

A yellow sabagem.
STORY 02

The Researchers Who Believed in the Heart

Smiling green scientist with glasses holding test tube, with emotional faces drawn on chalkboard behind.

Even in a society that had turned away from emotions, some researchers kept believing: “Emotions are the foundation of civilization.”

They are the Cocoro Experts.

Many of them had watched someone close to them slowly lose their emotions. As society became more efficient, loneliness grew deeper, and people’s hearts quietly began to break.

Those experiences led them to dedicate their lives to research.

When the crisis on Planet Barbu reached a breaking point, their work was finally seen as the planet’s last hope. And so, Project Ranger was born.

A yellow sabagem.
STORY 03

The Launch of Project Ranger

Spaceship with a diamond-shaped window flying in space with Earth and a rainbow trail behind it.

Project Ranger has one mission: Collect a wide range of emotions and make the Saba Gem shine again.

But on Planet Barb, where emotions had almost disappeared, collecting emotional energy was no longer easy. So the researchers turned their eyes beyond their home planet.

The planet they chose was Earth: a blue planet where humans still shine with countless emotions.

The Cocoro Experts boarded the spaceship Sabab-Ranger and set off for Earth.

A yellow sabagem.
STORY 04

Sabab and You

Two cartoon characters stand beside an egg-shaped display with colorful sections and a shadow silhouette inside.

To study emotions on Earth, the Cocoro Experts created tiny life-forms called Sabab.

Each Sabab is born from emotional energy stored in an Emo Tank and sent to Earth.

Through the app, Sabab learn how to communicate with people. As you talk with them, they collect emotional energy and send it back to the Sabab-Ranger.

The Cocoro Experts analyze this energy and search for a way to save Planet Barbu.

Sometimes, a Cocoro Expert will speak with you directly and listen to whatever is on your mind. It is part of their research, but it is also a moment to share what is in your heart.

Every moment you spend with your Sabab, and every conversation you have with an Expert, becomes part of the research that may save a distant planet.

STORY 01
A blue sabagem.
A yellow sabagem.
STORY 01

A Planet Losing Its Emotions

Far away in the Andromeda Galaxy lies Planet Barbu, home to an advanced civilization. Technology had reached incredible heights, and society was built around efficiency and logic.

Deep inside the planet rests the , a miraculous crystal that shines by feeding on many different emotions. It is the source of all energy on Planet Berb.

But over time, the people of Barbu began to push away emotional ups and downs, seeing them as unnecessary and inefficient. As they slowly let go of their feelings, the Saba Gem lost its glow.

Planet Barbu fell into a serious energy crisis. Even now, the planet is fighting for survival.

Two sabab characters, whoi are cocoro experts feel sad because there is not enough emotional data in their star.
STORY 02
A blue sabagem.
A yellow sabagem.
STORY 02

The Researchers Who Believed in the Heart

Even in a society that had turned away from emotions, some researchers kept believing: “Emotions are the foundation of civilization.”

They are the Cocoro Experts.

Many of them had watched someone close to them slowly lose their emotions. As society became more efficient, loneliness grew deeper, and people’s hearts quietly began to break.

Those experiences led them to dedicate their lives to research.

When the crisis on Planet Barbu reached a breaking point, their work was finally seen as the planet’s last hope. And so, Project Ranger was born.

Yobi, one of the cocoro experts, is executing the research of emotional data.
STORY 03
A blue sabagem.
A yellow sabagem.
STORY 03

The Launch of Project Ranger

Project Ranger has one mission: Collect a wide range of emotions and make the Saba Gem shine again.

But on Planet Barb, where emotions had almost disappeared, collecting emotional energy was no longer easy. So the researchers turned their eyes beyond their home planet.

The planet they chose was Earth: a blue planet where humans still shine with countless emotions.

The Cocoro Experts boarded the spaceship Sabab-Ranger and set off for Earth.

A spaceship "Ranger" is moving around the earth.
STORY 04
A blue sabagem.
A yellow sabagem.
STORY 04

Sabab and You

To study emotions on Earth, the Cocoro Experts created tiny life-forms called Sabab.

Each Sabab is born from emotional energy stored in an Emo Tank and sent to Earth.

Through the app, Sabab learn how to communicate with people. As you talk with them, they collect emotional energy and send it back to the Sabab-Ranger.

The Cocoro Experts analyze this energy and search for a way to save Planet Barbu.

Sometimes, a Cocoro Expert will speak with you directly and listen to whatever is on your mind. It is part of their research, but it is also a moment to share what is in your heart.

Every moment you spend with your Sabab, and every conversation you have with an Expert, becomes part of the research that may save a distant planet.

Sabab has been born through Emo-tank, which will store the emotional data as Sababa.
Illustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topics
How was your day today?
Nothing special,
but I was kind of on edge all day.
I might be a little tired.
You’ve been holding it in, huh?
That’s exhausting. You can relax here.
Can I talk about something from work?
Of course!
I’m here for anything you want to share.

Talk with Sabab

Every emotion — joy, anger, sadness, excitement —becomes a treasure for you and Sabab.

On tired days. On days when words won’t come easily. Sabab gently listens and stays with you.

Type to chat with Sabab. As it gathers emotional energy, its color changes to reflect the feelings you share together.

Talk with the right expert for what you’re going through

Sabab is your growing companion.
The Cocoro Experts are your specialized guides.

While Sabab grows with your everyday feelings, the Experts help you pause, reflect, and see things more clearly from a professional perspective.

Illustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topicsIllustration explaining that users can discuss unique topics

Notice how you change over time

What you felt.
What you struggled with.
What you discovered.

Your emotional journey is recorded in “Emonote” — a gentle log of your growth and discoveries.
Over time, you’ll begin to notice patterns, shifts, and quiet progress in yourself.

Cocoro Experts will help you make sense of what you’re feeling

Cocoro Experts will organize
your feelings

Self-understanding · Relationships · Emotions · Career · Wellness
Choose a topic, and the right Cocoro expert will offer gentle insights and guidance.

Frequently Asked Questions

What is Sabab?
an open icon

Sabab is an app where you talk with a small being from the distant planet Berb, helping you explore and make sense of your emotions.
Through your conversations, Sabab gathers emotional energy and gradually grows.
Your everyday thoughts and deeper worries alike become part of a meaningful journey.

Who created the Sabab app?
an open icon

We’re Sabab — a small team of engineers, researchers, and creatives.
Based primarily in Tokyo, we’re curious, open to new ideas, and optimistic about the future.
We’re building a world where everyone has a place to belong.

Is this powered by AI?
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Yes. Sabab is powered by advanced AI models.
Its personality is designed to feel like a curious friend from another planet, making conversations engaging, playful, and thoughtful.

Can I use Sabab for free?
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Yes. The free version includes a daily chat limit and basic features.
Additional customization items and expanded features are available for purchase if you’d like to personalize your experience further.

Are conversations recorded?
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Yes. Conversations within the Sabab app are securely stored to help create memory for your Sabab and Cocoro Experts, improving personalization over time.
Your data is never sold, and it is not shared without your consent

What is your privacy policy?
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You can read our privacy policy here.
In short, Sabab collects data only to improve your experience within the app.
Your information is kept secure and never shared without your consent.

How do I delete my account and data?
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To delete your account and data:
Open the Sabab app → Tap your profile in the top left → Go to “Account” → Select “Delete account” at the bottom.

The iOS app “Sabab” is available for free on the App Store.
Android version coming soon.

A link button of Sabab  app at the app store.