ENERGETIC
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
Know this morning’s you, then start the day.
Wake up to a simple view of last night’s records.
“Can I push as usual today?”
Feelmo does not guess how you feel. It shows proprietary Balance and six product characters, while processing and character-display rules remain private. Treat the number as one clue and give priority to how you actually feel.
- Free · iPhone & Apple Watch · iOS 17+ · 11 languages
- Design informed by research at Keio University — not university approval or product-level clinical validation
- App Privacy · Data Handling
How Balance works
One reference point when you ask, “Can I push as usual today?”
Balance is a proprietary wellness display that summarises available HRV-derived information and patterns in your own past on device. Processing and character-display rules are not public. It is not a medical normal range or a direct measurement of autonomic state, emotion, fatigue, or recovery. Do not decide whether to push or rest from this number alone.
The Premium tomorrow-morning view is everyday reference information. Its detailed display rules are not public, and it does not predict fatigue, mood, recovery, or whether activity is safe.
Our Story
Born in Japan, raised by research.
Feelmo is an iOS app made in Japan by Lumo, a research-led health-science studio. Findings from research at Keio University informed its design; this does not mean the university approved the product or clinically validated its benefit. Feelmo uses proprietary on-device processing to summarise available HRV-derived information and your own past trend; processing details are not public. HRV does not directly measure autonomic state, emotion, fatigue or recovery. HealthKit data handled by Feelmo is not uploaded automatically to Provider servers. If you initiate an export or share, selected content goes to your chosen destination.
Our aim is to distinguish established research, remaining uncertainty and Feelmo-specific estimates while making daily records easier to understand.
Design informed by research at Keio University — not university approval or product-level clinical validation
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.
Japanese public surveys report work-related stress and self-rated mental health among their respondents. Percentages depend on the survey question, sample and date and should not be generalised to every person in Japan.
67.5%Workers in the cited survey reporting matters that cause strong anxiety, worry, or stress about work or working lifeMHLW 2025 Occupational Safety and Health Survey; specific to its wording, sample, and date
19.3%Respondents in the cited survey rating their current mental health “not very good” or “not good”Survey reported in the MHLW 2024 White Paper; specific sample and date
Three limits of existing solutions
A · JOURNALING APPS
Input can feel burdensome
Lengthy text entry can make daily use harder for some people. Retention varies by product, population and study design, so we do not claim one universal rate.
B · MEDITATION
The link to your records may be unclear
With content-centred products, it can be difficult to review how a practice relates to records you entered yourself.
C · WEARABLES
Numbers need context
HRV and sleep values can be difficult to interpret without measurement context and your own experience.
The six characters
Six Feelmo product characters. Their display rules are not public, and they do not identify emotion, fatigue, or recovery.
CALM
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
NEUTRAL
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
ANXIOUS
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
OVERLOADED
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
TIRED
Feelmo
A Feelmo product character. Its display rules are not public, and it does not measure or determine emotion, fatigue, recovery, autonomic state, or whether activity is safe.
Tap a companion to read their little story.
Product Experience
Four bottom tabs for mind and body.
The bottom bar has Home, Mood Log, Trends and Wellbeing. Open Breathing full-screen from Home or another entry point, and open Settings from the gear.
Home
ホーム
Records and vitals at a glance, on one screen.
Mood Log
こころ記録
Review Balance, its character label and your own entries by week, month or year.
Trends
トレンド
Balance, HRV and related records over time — week to year.
Wellbeing
ウェルネス
Sleep, daylight, steps, water and caffeine, in one view for the day.
Balance and product characters can appear automatically.
When usable records are available, Feelmo can show its proprietary Balance and a product character. Processing and display rules are not public, and this is not emotion detection. You may separately record how you actually feel.
Six visual breathing pacers.
Follow the timing of 4-7-8, Box, Calm, Energy, Sigh, or Coherent breathing. Session names do not guarantee an effect. Choose a comfortable pattern and return to natural breathing if it feels difficult.
Habit association patterns (Premium).
Feelmo summarizes observational associations between habit records you logged and Balance. Proprietary processing details are not public. This does not prove a causal effect.
On your wrist, and your home screen.
This morning’s Balance appears on a watch-face complication and Home- and Lock-screen widgets; the tomorrow-morning reference appears in the Apple Watch app. Neither decides whether activity is safe.
Try it
Breathe with us, for 30 seconds.
A small taste of the app's breathing session. Follow the circle, slowly.
Science
Separate what is known from what remains uncertain.
HRV research informs Feelmo’s design. It does not by itself establish clinical validity or benefit for a proprietary product display. Product-processing details are not public.
01
HRV physiology
HRV is associated with autonomic activity, but does not directly measure a sympathetic–parasympathetic “balance”. Context and measurement conditions matter.
02
Measurement context
Breathing, posture, sleep, exercise, health, medication and device error affect interpretation.
03
Individual and measurement variation
HRV varies across people and measurement conditions, so a single reading is not a diagnostic threshold.
04
Observed association
An association between habit records and Balance does not establish a causal effect. Proprietary processing details are not public.
05
Product limits
Balance is an everyday reference display, not a medical test or proof of product benefit.
06
Psychology & behavioral science
A gentle way of holding feelings, and habits designed to last without pressure.
07
Time and context
HRV varies with time, sleep, breathing, posture, exercise, medication and health, so trends need comparable context.
Research informs the design. Balance, character labels and the tomorrow-morning reference are not medical tests, university approval or confirmation of product-level clinical benefit.
Technology & Trust
A proprietary wellness display informed by HRV research.
HRV is variation in beat-to-beat intervals and is affected by breathing, posture, sleep, exercise, health, medication and measurement conditions. It is not a standalone direct test of autonomic state, mood, fatigue or recovery. Feelmo uses proprietary on-device processing to summarise available HRV-derived information and your own past trend as Balance; processing details are not public.
Sensitive data, designed to earn your trust.
On-device first
HealthKit data handled by Feelmo, your own entries and HRV time-series processing remain on this device, with no automatic upload to Provider servers. If you initiate an export or share, selected content goes to your chosen destination.
Permission when needed
Initial setup explains the HealthKit types needed for core features. Turning on optional features such as linking State of Mind entries you explicitly save may prompt for additional relevant permissions. Revoke any type anytime from the Health app.
Manage app data
Data handled within Feelmo stays on your device and can be deleted. Premium can export selected records as an A4 · 3-page PDF.
App Privacy · Data Handling
How the Feelmo app handles relevant data. Its App Store privacy label is “Data Not Collected”; this does not describe Apple, HealthKit or other apps and services as a whole.
- Data Linked to You
- None
- Data Used to Track You
- None
- Data Feelmo Handles On Device
- User entries · HRV · Behavior tags · Wellbeing records
- Health Records Sent to Provider Servers
- No automatic upload — user-initiated PDF export or sharing sends selected content to the chosen destination
- Data Sold to Third Parties
- Never
Pricing
Core morning features are free. The tomorrow-morning reference and longer reviews are Premium.
The current free plan includes morning Balance, six product characters, and breathing exercises. Premium adds a tomorrow-morning reference with non-public display rules and long-term views. A free trial or first-year offer applies only when shown to an eligible customer on the purchase screen.
Free
¥0
For your first weeks of watching.
- Morning Balance (a proprietary wellness display)
- Six product characters
- Self-entered notes and calendar
- Guided breathing (with heart-sound, 6 patterns)
- Wellbeing & habit tracking (today & yesterday)
- Feelmo app data processed on device and deletable
Feelmo Premium
¥4,980 / year
¥4,980 per year. Eligible Apple IDs may be shown a ¥2,980 first-year offer (about ¥248 a month when divided by 12; billed annually).
- Tomorrow-morning reference (display rules are not public)
- Kokoro Report (share as an A4 · 3-page PDF)
- Habit-related patterns (not proof of cause or effect)
- Long-term trends (Balance, HRV and related records)
- Up to one year of history
- 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?
Core features are available on the free plan. Premium adds a tomorrow-morning reference with non-public display rules, up to one year of long-term views, and the Kokoro Report.
| Free | Premium | |
|---|---|---|
| Balance score | ✓ | ✓ |
| Mood Log & feelings calendar | ✓ | ✓ |
| Guided breathing (with heart-sound) | ✓ | ✓ |
| The six companions | ✓ | ✓ |
| Wellbeing & habit tracking (today & yesterday) | ✓ | ✓ |
| Tomorrow-morning reference (display rules are not public) | — | ✓ |
| Kokoro Report (A4 · 3-page PDF) | — | ✓ |
| Habit-related patterns | — | ✓ |
| Long-term trends (Balance, HRV and related records) | — | ✓ |
| Up to one year of history | — | ✓ |
| Day-before pressure-drop heads-up (weather info) | — | ✓ |
| No automatic upload of health records to Provider servers | ✓ | ✓ |
Monthly ¥980 · Weekly ¥480 · Yearly ¥4,980. A free trial or ¥2,980 first-year offer applies only when shown to an eligible Apple ID on the purchase screen. That screen controls current duration, price, billing, and renewal terms.
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 CompanionsAbout the product charactersBreathing 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.
Do I need an Apple Watch?
An Apple Watch is used for Balance, which summarises available HRV-derived information and your past trend through proprietary on-device processing. Processing and character-display rules are not public. The six faces are product characters; they do not infer emotion.
Is it a medical device?
No. Feelmo is not a medical device and must not be used for diagnosis or treatment decisions. HRV and Balance are everyday reference information; they do not directly measure autonomic state, mood, fatigue, or recovery.
Where is my data stored?
HealthKit data handled by Feelmo, HRV, behavior tags, and wellbeing records are processed on device with no automatic upload to Provider servers. You can delete them, and we do not sell them. A user-initiated PDF export or share sends selected content to the chosen destination.
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
This morning’s record — and a reference for tomorrow morning.
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 and cannot diagnose, guide treatment or determine whether activity is safe. HRV and the proprietary Balance score do not directly measure autonomic state, emotion, fatigue or recovery. Consult a qualified professional for concerning symptoms regardless of the score. If text in a user-entered note contains language associated with severe distress, Feelmo can show support resources; this is signposting, not diagnosis or clinical intervention.
— A little light for your balance.