Kokaru

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Wellbeing, truly measured

Energy you feel. Privacy you trust.

Measure your energy, sleep, stress and recovery in real time, with real physiological data, not surveys.

See devices See how

New · Kokaru KB8

The first Kokaru band with ECG.

The full Kokaru ecosystem plus on-demand electrocardiogram. Heart health, on your wrist.

Meet the KB8 Compare models

From $300,000 · 12 months of membership included

KR3 ring · KB5 band

One ecosystem. The form you prefer.

A discreet ring or an elegant band, water resistant and with the same Kokaru wellbeing intelligence.

Choose my Kokaru See the app

From $200,000 · 12 months of membership included

24/7

Continuous energy and stress monitoring

12 months

Of membership included with every device

31+

Wellbeing metrics in real time

Law 21.719

Ready · data privacy by design

Devices

Choose your Kokaru

Three ways to live the same wellbeing ecosystem. They all share the same sensors and intelligence; the KB8 adds an electrocardiogram (ECG). Each one includes 12 months of membership.

Band · metal mesh

Kokaru KB5

Your entry into the Kokaru ecosystem, with a premium woven-steel finish.

$200.000CLP

✦ 12 months of membership included

✓ Body Energy, stress and sleep
✓ Nocturnal HRV and heart rate
✓ Steps, activity and calories
✓ Water resistant

Buy KB5

Smart ring

Kokaru KR3

All the Kokaru intelligence in a ring you barely feel.

$250.000CLP

✦ 12 months of membership included

✓ Body Energy, stress and sleep
✓ Nocturnal HRV and heart rate
✓ Steps, activity and calories
✓ Ring form · water resistant

Buy KR3

Band · elastic fabric

Kokaru KB8

The most complete Kokaru: adds an on-demand electrocardiogram (ECG).

$300.000CLP

✦ 12 months of membership included

✓ Electrocardiogram (ECG)
✓ Body Energy, stress and sleep
✓ Nocturnal HRV and heart rate
✓ Steps, activity and calories · water resistant

Buy KB8

Comparison

Same intelligence. You choose the form.

All devices share sensors, metrics and membership. The only functional difference is ECG, exclusive to the KB8.

Feature	KB5Band · metal mesh	KR3Smart ring	KB8Band · elastic fabric
Body Energy	✓	✓	✓
Stress level	✓	✓	✓
Sleep and nocturnal recovery	✓	✓	✓
Nocturnal HRV (RMSSD)	✓	✓	✓
Heart rate and resting HR	✓	✓	✓
Heart Rate Recovery and VO₂ Max (est.)	✓	✓	✓
Blood oxygen (SpO₂)	✓	✓	✓
Steps, activity and calories	✓	✓	✓
Mood and Mental State Index	✓	✓	✓
K Points, goals and rewards	✓	✓	✓
Water resistant	✓	✓	✓
Posture and racket tracker (Kokaru Up)	✓	✓	✓
Kokaru Up (accessory)	—	✓	✓
Electrocardiogram (ECG)	—	—	✓
Membership included	12 months	12 months	12 months
Price	$200.000	$250.000	$300.000

Your body, in real time

Everything Kokaru understands about you

Real physiological data turned into simple decisions: when to push, when to rest.

🔋

Body Energy

A battery from 0 to 100% that rises with calm and drops with load. You know how much energy you wake up with and how you spend it.

🧭

Stress level

From "stressed" to "restorative". Kokaru reads your autonomic system and shows you where you are right now.

🌙

Sleep and recovery

How you slept and the charge you start the day with: nocturnal HRV, resting HR and sleep stages.

🧠

Mental state

Mood and Mental State Index to support your emotional wellbeing day to day.

🏃

Activity and sport

Steps, calories and intensity, plus racket swing tracking with a wrist sensor.

❤️

Heart and ECG

Heart rate, SpO₂ and, only on the KB8, an on-demand electrocardiogram.

See all 30+ features in detail →

Accessories and connections

The Kokaru ecosystem expands

Kokaru Up, our own sensor for posture and racket sports, connects with the KR3 and KB8 plans. You can also integrate with Eufy smart scales (third party).

🧍

Kokaru Up, posture tracker

Our posture sensor: tracks your alignment and nudges you when you slouch, by vibration or notification.

Kokaru · KR3 and KB8 plans

🎾

Kokaru Up, racket tracker

Our sensor for racket sports: shots, impact and swing speed, live.

Kokaru · KR3 and KB8 plans · Beta

⚖️

Eufy smart scales

Your weight and body composition (fat, muscle, water, bone, visceral fat, BMI, BMR) go straight into Kokaru over Bluetooth, no logging by hand.

Integration · third party

🫀

Built-in ECG (KB8)

The Kokaru KB8 adds a single-lead electrocardiogram and irregular-rhythm screening, informational, not a diagnosis.

KB8 only

Precision + heart

Engineering that cares, not that watches

Kokaru combines sensor precision with real human support. Reliable data and a warm, close experience.

🎯
Real data, not surveys
Physiological signals measured 24/7, not self-reported perceptions.
🔒
Privacy by design
Your data is yours and travels encrypted. Compliant with Law 21.719.
🇯🇵
Designed in Japan
Hardware and software built and validated with precision. Part of Nagare Japan Inc.

Kokaru App · iOS and Android

Your wellbeing, on a single screen

View energy, sleep, stress and activity in real time. Available for iPhone and Android.

Download on the
App Store ▶Get it on
Google Play

🔒 Law 21.719 Ready

Your privacy is the priority

Your personal data is confidential and only yours. Companies access only aggregated, anonymous information, never identifiable individual data.

👤
Individual data, only for the user
No one else sees your identifiable personal information.
📊
Companies see anonymous aggregates
Corporate dashboards with k-anonymity, never a single person.

Kokaru for business

Teams with more energy and focus

Human burnout is the biggest energy leak in organizations. Kokaru measures and improves it, protecting each person's privacy.

−Absenteeism

Fewer days lost to fatigue and stress.

+Energy

Teams with more focus and sustained performance.

+Culture

Better wellbeing and a culture of care.

100% anonymous

Aggregated dashboards, privacy by design.

Energy you feel. Privacy you trust.

The first Kokaru band with ECG.

One ecosystem. The form you prefer.

24/7

12 months

31+

Law 21.719

Choose your Kokaru

Kokaru KB5

Kokaru KR3

Kokaru KB8

Same intelligence. You choose the form.

Everything Kokaru understands about you

Body Energy

Stress level

Sleep and recovery

Mental state

Activity and sport

Heart and ECG

The Kokaru ecosystem expands

Kokaru Up, posture tracker

Kokaru Up, racket tracker

Eufy smart scales

Built-in ECG (KB8)

Engineering that cares, not that watches

Real data, not surveys

Privacy by design

Designed in Japan

Your wellbeing, on a single screen

Your privacy is the priority

Individual data, only for the user

Companies see anonymous aggregates

Teams with more energy and focus

Bring Kokaru to your team