ENERGETIC
A morning of good regulation
Slept well, head light, hand reaching toward something. When regulation is on the higher side and steady, Energetic shows up.
Feelmo
We don't guess your feelings.We watch over your regulation.
An iOS app that translates the small fluctuations of your heartbeat — read by Apple Watch — into six gentle characters.
Rather than guessing what you feel right now, Feelmo returns where your body's regulation sits today, gently, in six familiar faces.
Our Story
Born in Japan, raised by research.
Feelmo is an iOS app crafted in Japan by Lumo, a research-led health-science studio. Its core heart-rate-variability analysis was born from joint research with Keio University, and the app itself is raised in Higashi-Mikawa, Aichi — a step away from the speed of the metropolis, where everyday life keeps its own quiet rhythm. Not wellness as a trend — verified science, delivered as a gentle daily experience. That is the conviction behind this app.
Academic partner — Keio University
The culture of "totonou"
Japan has long had a habit of "tuning."
The clear, settled feeling at the core of your head after a sauna. The unknotting of your shoulders as you sink into a hot spring. The night when, in the evening bath, the body slowly comes undone. In Japan the word "totonou" — to be tuned, settled — has long named that loosening of body and mind. Feelmo was born in the country where that culture grew. To place tuning not as something science hurries you toward, but quietly within the rhythm of daily life — that stance is inherited from this soil.
OnsenSinking into hot water as the shoulders let go.
SaunaBetween heat and cool air, the head clears — "totonou".
OfuroThe evening bath where the body slowly comes undone.
Feelmo watches over that settling, gently, beside you.
Our Mission
Harmony between feeling and health,for a better every day.
We gently weave together the subjective — what you feel — and the objective — what your body is showing — so that each person can understand themselves.
Our Vision
By 2030, "tuning the mind" becomes a daily practice.
01
Self-understanding, for everyone
Anyone can understand the relationship between their feelings and their vitals — in words and in numbers.
02
Preventive wellness
Notice before unwellness arrives. Not diagnosis — a daily culture of tuning.
03
Co-creating life data
Data circulates back to the person it came from, lifting the wellbeing of society as a whole.
Why now
A quiet stress, spreading unnoticed.
In Japan, over 80% of working adults report strong stress — yet the daily habit of tending to one's mental health is still rare.
82.7%Workers reporting strong stress about their job or working lifeSource: MHLW Occupational Safety & Health Survey, 2023
19.3%Adults reporting their mental health as 'not good' or 'somewhat poor'Source: MHLW White Paper, 2024
7.6tn JPYAnnual economic loss from mental health issues among workers (≈1.1% of GDP)Source: Juntendo University et al., 2023 (n=27,507)
Three limits of existing solutions
A · JOURNALING APPS
Hard to keep going
Text-heavy input creates friction; three-week retention is typically below 20%. Feelings are recorded richly but disconnected from objective signals.
B · MEDITATION
Consumed, not connected
Content you consume that doesn't respond to your state. When and what to practice is left to the user's intuition.
C · WEARABLES
Numbers without meaning
HRV and sleep data are captured, but they aren't connected to subjective context — the 'meaning' of the number rarely reaches the person.
The six characters
Six faces, six states of regulation.
CALM
A river that runs quiet
Regulation is well-tuned — neither hurried nor halting. The deepest, slowest version of being settled.
NEUTRAL
As you are, today
Not particularly good, not particularly bad — an ordinary day. Regulation sits near baseline. Feelmo does not undervalue the ordinary.
ANXIOUS
A heart in a slight hurry
A faint restlessness — as if the body is bracing for something. A sign that regulation is wobbling, gently.
OVERLOAD
Carrying a little too much
You may be pushing through with willpower, but the body is already signaling. Regulation has swung markedly downward.
TIRED
Permission to rest
A body waiting to be allowed to recover. Regulation has stayed low for a while; even ordinary activity is leaving traces.
Tap a companion to read their little story.
Product Experience
Five tabs, one daily practice of tuning.
A minimal surface area — five places to look, to record, and to tune.
Home
今日
Emotion and vitals at a glance, on one screen.
Emotion Log
こころ記録
Calendar and graph — two views.
Breathing
呼吸
Four guided breathing sessions, by need.
Behavior
行動
Sleep, sunlight, and AI coaching — unified.
Settings
設定
Notifications, permissions, themes, data export.
Find patterns with Emotion Log.
Two views — calendar and graph — across day, week, month, year. Patterns surface from the correlation between HRV and how you feel.
Four breathing patterns, matched to your state.
Guided sessions you can choose by situation — 4-7-8 to settle into rest, Box breathing to gather focus. HRV is measured before and after, so you can see the effect.
Behavior log and AI coaching.
Sleep, sunlight, and activity are recorded automatically. From their correlation with HRV, the coach suggests gentle daily nudges — never a diagnosis.
Try it
Breathe with us, for 30 seconds.
A small taste of the app's breathing session. Follow the circle, slowly.
Technology & Trust
A scientific foundation, anchored in HRV.
HRV — heart-rate variability — is among the most widely used physiological signals in clinical research, an objective marker of autonomic balance. Feelmo uses RMSSD as its standard, layering emotion logs over the same timeline so the meaning of the number reaches you in daily life.
Sensitive data, designed to earn your trust.
On-device first
The correlation between emotion logs and HRV is processed locally on your device. What leaves the device is kept to a minimum, by design.
Least privilege
HealthKit access is requested only as features need it, granularly. You can revoke any data type at any time.
Fully exportable
You can export your own data as CSV at any time, and delete it. Data, in the end, belongs to the person it came from.
App Privacy · Data Handling
How Feelmo handles your data, at a glance.
- Data Linked to You
- None
- Data Used to Track You
- None
- Data Kept On Device Only
- Emotion log · HRV · Behavior log
- Anonymous Data Sent
- Anonymous context for AI coaching only (when needed)
- Data Sold to Third Parties
- Never
Regulation Score
How the score is read
The Regulation Score — こころの調律度 — is a continuous 0–100 estimate of how well your autonomic nervous system is regulating, derived from the small fluctuations of your heartbeat captured by Apple Watch. It is the same single score, computed by the same Lumo Core algorithm that powers Lumo Research. Rather than showing a number first, Feelmo translates it into the nearest of the six characters and places that, gently, beside your day.
We do not try to guess feelings. What you feel right now is always yours to name. Feelmo only watches the body that comes before the name — in words, and in faces.
Pricing
Start free, gently.
The daily watch stays free. When you want to go deeper, Pro will be waiting.
Free
¥0
For your first weeks of watching.
- Regulation Score with Apple Watch
- Daily check-ins with the six companions
- Emotion Log calendar
- CSV data export
Feelmo Pro
Pricing announced soon
Know yourself, a little deeper.
- Weekly, monthly & yearly trends
- Unlimited AI coaching
- All breathing sessions + history
- Early access to new features
* Features and pricing may change at official release.
Guide
For those who want to know more.
From how to use it to the science of HRV — nine chapters.
Getting StartedSetup & requirementsLiving with FeelmoA day in the flowRegulation ScoreReading the 0–100 scoreUnderstanding HRVHRV & analysis methodsThe Science of RegulationCited scientific backgroundThe Six CompanionsWhat the six faces meanBreathing SessionsFour guided patternsBehavior & AI CoachSleep, sunlight, activityData & PrivacyOn-device storage & CSV
Common questions
Short answers to what people ask most.
Is Feelmo free?
Yes — free to download, free to start.
Do I need an Apple Watch?
The Regulation Score is measured with Apple Watch. Some features, like emotion logging, work on iPhone alone.
Is it a medical device?
No. Feelmo is not a medical device and is not intended for diagnosis or treatment. It is a wellbeing app for observing and recording autonomic regulation.
Where is my data stored?
Emotion logs, HRV, and behavior logs stay on your device. You can export everything as CSV or delete it at any time. We never sell your data.
Which languages does it support?
The app supports Japanese and English. This website is available in five languages.
The full how-to lives in our guide.Open the guide →
Get the App
Coming soon to the App Store.
Coming soon to iPhone and Apple Watch.
What Feelmo does not do
Feelmo does not diagnose.
Feelmo is not a medical device. It is not designed to diagnose, treat, or replace clinical judgment. It is a wellbeing tool for observing and recording your autonomic regulation. For any clinical concern, please consult a qualified professional.
— A little light for your regulation.