ENERGETIC
A morning of good balance
Slept well, head light, hand reaching toward something. When balance is on the higher side and steady, Energetic shows up.
Wake up already knowing.
Just wear your Apple Watch to sleep. Each morning, your overnight heart-rate variability (HRV) becomes your autonomic “Balance” — one plain line and one of six companion faces. Measured against your own usual, never anyone else’s. Nothing to set up, nothing to type. (Tomorrow’s condition forecast is Premium.)
A day to push, or a day to ease — no more guessing.
Rather than guessing what you feel right now, Feelmo returns where your body's balance sits today, gently, in six familiar faces.
This morning’s Balance — in a word and six faces.
Start with each morning’s Balance — a day to push a little, a day to ease off, at a glance, read against your own usual.
From the small fluctuations of your heartbeat that Apple Watch reads through the night, Feelmo gauges how well your autonomic nervous system is settling and returns it each morning as a 0–100 “Balance” score, translated into the nearest of six companion faces. What it holds you up against is never other people — only your own usual — so a single glance tells you whether today is a day to push a little or a day to ease off. Today’s Balance is free, always. Even so, Feelmo never tries to guess how you feel — what you feel right now is always yours to name.
Once you’ve settled into the habit, you can look a step ahead. From how tonight’s sleep and heart-rate variability drift from your usual, Feelmo gently forecasts tomorrow morning — fatigue, focus, how easily stress lands, mood swings, recovery — read against your own normal, getting just slightly ahead of a dip before you feel it. This is an outlook of your own within-person tendencies, not a diagnosis, and on mornings with too little data it quietly rests. (Tomorrow’s condition forecast is a Premium feature.)
Our Story
Born in Japan, raised by research.
Feelmo is an iOS app made in Japan by Lumo, a research-led health-science studio. Designed informed by research at Keio University, it reads the subtle fluctuations of the heartbeat your Apple Watch captures through advanced signal processing to sense the tendencies of your autonomic balance — personalized by what it learns from your own records, and paired with a measure of how certain each reading is. Every analysis and summary completes on your device; your health data never leaves it.
We believe in a next connection: with the technology that has long linked people to the world, this time a person connects with themselves. Not wellness as a trend, but verified science turned into a gentle daily experience — that is Feelmo's hope.
Design — informed by research at 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
Proactive self-care
Make daily “tuning” a habit, not a diagnosis; gently notice the small differences from your usual.
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 balance.
CALM
A river that runs quiet
Balance 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. Balance 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 balance is wobbling, gently.
OVERLOADED
Carrying a little too much
You may be pushing through with willpower, but the body is already signaling. Balance has swung markedly downward.
TIRED
Permission to rest
A body waiting to be allowed to recover. Balance has stayed low for a while; even ordinary activity is leaving traces.
Tap a companion to read their little story.
Product Experience
Five tabs for heart and body.
A simplicity you won’t get lost in — just five tabs to open each day.
Home
ホーム
Emotion and vitals at a glance, on one screen.
Mood Log
こころ記録
Your daily balance and mood, recorded automatically. Look back by week, month, year.
Breathing
呼吸
Six guided breathing sessions, by need.
Trends
トレンド
Balance, autonomic and HRV over time — week to year.
Wellbeing
ウェルネス
Sleep, daylight, steps and water (caffeine), in one view for the day.
Your mood log records itself.
From your Apple Watch data, the algorithm records your balance and mood automatically each morning — nothing to type, nothing to pick. On any day you can add a short note if you like (optional). Your distribution across this week, this month and this year, plus a calendar, so your rhythm gently comes into view. On hard notes, Feelmo quietly signposts a crisis line.
Six patterns, matched to how you feel now.
Choose from 4-7-8, Box, Calm, Energy, Sigh breathing (Cyclic Sighing, ~3 min) and Coherent breathing — whatever fits how you feel now. You can also breathe from your wrist; your current heart rate is available anytime on its own screen, as reference only.
Habit-impact, gently (Premium).
Sleep, daylight and activity are recorded automatically, and from your own records Feelmo shows which actions seem to help, grounded in comparison. A daily cue, not a diagnosis.
On your wrist, and your home screen.
This morning’s balance is glanceable on a watch-face complication and Home- and Lock-screen widgets; tomorrow’s forecast lives in the Apple Watch app. The companion and the number stay beside you without opening the app.
Try it
Breathe with us, for 30 seconds.
A small taste of the app's breathing session. Follow the circle, slowly.
Science
A gentle face, real science underneath.
There is more science inside Feelmo than its gentle surface lets on — methods established in heart-rate-variability (HRV) research, all running on your device. We hide the complexity and return only the certainty, gently.
01
Autonomic science
We read the subtle variation in your heartbeat (HRV) from many angles, in a multi-dimensional way, to sense the balance of rest and tension.
02
Signal processing
Through spectral analysis and noise removal, we strip out wear artifacts and keep only the measurements we can trust.
03
Data science & statistics
We learn your own baseline — not an average stranger’s — and quantify our confidence. Numbers we are unsure of, we simply do not show.
04
Causal inference
We carefully tell mere correlation apart from what may genuinely suit you, grounded in comparison.
05
Machine learning & AI
Personalization that keeps learning you, with inference that runs on your device rather than the cloud.
06
Psychology & behavioral science
A gentle way of holding feelings, and habits designed to last without pressure.
07
Chronobiology
The same number can mean different things by time of day, weekday or season; we account for your body’s rhythms.
What we build on is sound science (the specific methods and algorithms are Feelmo’s own technology, guarded with care). Feelmo is not a medical device and is not intended for diagnosis or treatment.
Technology & Trust
A scientific foundation, anchored in HRV.
HRV — heart-rate variability — is widely used in research as a clue to autonomic balance. Feelmo does not expose a single public metric as the score; it combines multiple body signals, measurement quality, and movement from your own baseline on device, then returns a daily balance signal you can actually read.
Sensitive data, designed to earn your trust.
On-device first
Your mood-log and HRV time-series analysis runs on this device. We never send health data to our servers.
All disclosed up front
We disclose every item we use up front during onboarding and request them together — we never spring new requests on you later. Revoke any data type anytime from the Health app.
Your data is yours
Your data stays on your device and you can delete it anytime. Premium can export the Kokoro Report as an A4 · 3-page PDF. Data, in the end, belongs to the person it came from.
App Privacy · Data Handling
How Feelmo handles your data, at a glance. The App Store privacy label is “Data Not Collected.”
- Data Linked to You
- None
- Data Used to Track You
- None
- Data Kept On Device Only
- Mood logs · HRV · Behavior tags · Wellbeing records
- Health Data Sent Off-Device
- None — analysis and summaries all complete on-device
- Data Sold to Third Parties
- Never
Pricing
This morning’s Balance stays free, forever. Wake up with a read on tomorrow from about ¥248 a month.
Each morning’s Balance score, the six companion faces, and the breathing exercises are free, always. Premium adds tomorrow — a quiet heads-up on whether it looks like a day to push or a day to ease — plus an outlook that grows to fit you the more you use it. The monthly plan opens with a free first week, and you can cancel anytime. (Tomorrow’s read is a tendency within you, not a diagnosis and not fortune-telling.)
Free
¥0
For your first weeks of watching.
- Morning Balance score (with your own “vs-usual” baseline gauge)
- The six companions
- Mood Log & feelings calendar
- Guided breathing (with heart-sound, 6 patterns)
- Wellbeing & habit tracking (today & yesterday)
- On-device data, deletable anytime
Feelmo Premium
¥4,980 / year
First year ¥2,980 — about ¥248 a month, for tomorrow’s forecast every morning. The more you use it, the more it grows to fit your tendency.
- Tomorrow's condition forecast (＋ your weekday tendency calendar)
- Kokoro Report (share as an A4 · 3-page PDF)
- Habit-impact analysis (sleep, exercise, caffeine, and more)
- Long-term trends (Balance, autonomic, HRV)
- Full history (up to a year)
- A heads-up the day before pressure drops (weather info — not a prediction of how you’ll feel)
Free and Premium — what's the difference?
The daily watch stays free; Premium adds tomorrow’s forecast, the long view, and the Kokoro Report — growing to fit your tendency the more you use it.
| Free | Premium | |
|---|---|---|
| Balance score | ✓ | ✓ |
| Mood Log & feelings calendar | ✓ | ✓ |
| Guided breathing (with heart-sound) | ✓ | ✓ |
| The six companions | ✓ | ✓ |
| Wellbeing & habit tracking (today & yesterday) | ✓ | ✓ |
| Tomorrow's condition forecast (＋ weekday tendency calendar) | — | ✓ |
| Kokoro Report (A4 · 3-page PDF) | — | ✓ |
| Habit-impact analysis | — | ✓ |
| Long-term trends (Balance, autonomic, HRV) | — | ✓ |
| Full history (up to a year) | — | ✓ |
| Day-before pressure-drop heads-up (weather info) | — | ✓ |
| All data on-device · Data Not Collected | ✓ | ✓ |
Monthly ¥980 (with a free week) · Weekly ¥480 · Yearly ¥4,980 (first year ¥2,980). Try just one “tomorrow” first. * 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 flowBalance ScoreReading the 0–100 scoreUnderstanding HRVHRV & analysis methodsThe Science of BalanceCited scientific backgroundThe Six CompanionsWhat the six faces meanBreathing SessionsSix guided patternsWellbeing & HabitsSleep, sunlight, activityData & PrivacyOn-device storage & deletion
Common questions
Short answers to what people ask most.
Is Feelmo free?
Yes — free to download, free to start.
Can I cancel Premium? And what happens after the free period?
You can cancel anytime. The monthly plan comes with a free first week, and if you cancel during it you won't be charged. To stop the renewal or cancel, go to Settings › [your name] › Subscriptions on your iPhone, anytime.
Do I need an Apple Watch?
Your Balance score and mood are recorded automatically from the heart-rate variability (HRV) your Apple Watch reads overnight. Some features, like guided breathing and wellness logging, work on iPhone alone.
Do I have to journal or type something every day?
No. Wear your Apple Watch to sleep and your Balance and mood are recorded automatically by morning — nothing to write, nothing to pick. On any day you can add a one-line note if you like (optional). Since keeping it up matters most, we made the effort as close to zero as possible.
Does the "tomorrow forecast" come true?
Please don't read it as right-or-wrong. The forecast is a within-you tendency drawn from your own usual — not a promise of what's coming, and not a diagnosis. On mornings with little data it stays quiet rather than guess; we'd rather honestly say "today we can't tell."
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 balance.
Where is my data stored?
Your mood logs, HRV, behavior tags, and wellbeing records all stay on this device. You can delete everything at any time, and we never sell your data. (Premium can export the Kokoro Report as a PDF to share.)
Which languages does it support?
The app supports 11 languages (Japanese, English, German, French, Spanish, Italian, Korean, Brazilian Portuguese, Thai, Simplified Chinese, and Traditional Chinese). This website is available in eleven languages.
The full how-to lives in our guide.Open the guide →
Get the App
Today’s balance — and tomorrow’s forecast.
Now on the App Store. Free to start, on 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 balance. For any clinical concern, please consult a qualified professional. And if a note in your mood log shows signs of deep distress, Feelmo gently points you to crisis-support resources for 15 regions — supportive signposting, not clinical intervention.
— A little light for your balance.