Energetic
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
Make room for your records and how you feel.
Wake up to a simple view of last night’s records.
See your records, and make room for how you feel.
Measurements and feelings tell different stories. Feelmo brings your records and your own notes together so you can look back at changes without a score deciding how you feel.
- Free · iPhone & Apple Watch · iOS 17+ · 15 languages
- Design informed by research at Keio University — not university approval or product-level clinical validation
- App Privacy · Data Handling
Reading Balance
See your records, and make room for how you feel.
Balance is Feelmo’s own wellness indicator on a 0–100 scale. The calculation and character-display rules are not public. It is not a medical normal range. Consider your experience and symptoms too; do not use the number alone to decide whether to be active or rest.
The Premium reference view appears when suitable data is available. Check the target date and the time of the source records. It does not predict condition, mood, fatigue, recovery or whether an 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. 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"
Make room for a moment that suits you.
Feelmo began in Japan, where the word ‘totonou’ can describe a sense of settling or finding balance in some everyday routines. A warm bath or a pause outdoors are examples from that setting. They are not part of everyone’s life and do not guarantee an effect. Choose a moment that fits your own habits, surroundings and comfort.
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 makes room for your own way of looking back.
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
Daily reflection that fits your life.
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
Control over your data
Choose what to record, delete, export or share.
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 lifeJapan · MHLW 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”Japan · 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 characters make your records easier to recognise. You can separately record how you actually feel.
Calm
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
Neutral
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
Anxious
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
Overloaded
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
Tired
Feelmo
A character from Feelmo’s interface. Its name and expression do not determine your mood, fatigue or recovery.
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
Daily overview
Records and vitals at a glance, on one screen.
Mood Log
Your own entries
Review Balance, its character label and your own entries by week, month or year.
Trends
Long-term review
Balance, HRV and related records over time — week to year.
Wellbeing
Daily records
Sleep, daylight, steps, water and caffeine, in one view for the day.
Measurements and your own experience, together.
When usable records are available, Feelmo can show Balance and a character. You can separately record your actual mood or how you 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. This does not prove a causal effect.
On your wrist, and your home screen.
Today’s Balance can appear in an Apple Watch complication and Home- or Lock-screen widgets. With Premium and suitable data, the Watch app can also show a reference for the displayed date. Check the content and when it was updated.
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.
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.
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
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.
Research informs the design. Balance, characters and forecasts are not medical tests, university approval or evidence of the app’s clinical benefit.
Technology & Trust
A proprietary wellness display informed by HRV research.
HRV is variation in beat-to-beat intervals. Breathing, posture, sleep, exercise, health, medication and measurement conditions affect it. HRV and Balance do not directly measure autonomic state, mood, fatigue or recovery.
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
Choose read access by data type. Saving a State of Mind entry you choose to Apple Health requires iOS 18 or later and write permission. Notes and estimates from bodily data are not saved to Health. You can revoke access in Health.
Manage app data
An A4, three-page PDF report is available with Premium. Resetting Feelmo does not delete Apple Health records. Optional iCloud sync covers settings only, without health records.
App Privacy · Data Handling
Health data is processed on device.
- 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 features are free. Premium offers longer reviews.
The free plan includes Balance when suitable data is available, six characters, your own entries and guided breathing. Premium adds trends, longer views, PDF reports and forecasts when conditions are met. Check available prices and offers on the purchase screen.
Free
Free
For your first weeks of watching.
- Balance when suitable data is available
- 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
See App Store pricing
See the current price in your local currency, available plans and eligible offers on the app’s purchase screen.
- Reference for the displayed date, when suitable data is available
- 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 free. Premium adds trends, detailed views for up to one year, PDF reports and forecasts when suitable data is available.
| Free | Premium | |
|---|---|---|
| Balance score | ✓ | ✓ |
| Mood Log & feelings calendar | ✓ | ✓ |
| Guided breathing (with heart-sound) | ✓ | ✓ |
| The six companions | ✓ | ✓ |
| Wellbeing & habit tracking (today & yesterday) | ✓ | ✓ |
| Reference for the displayed date, when suitable data is available | — | ✓ |
| 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 | ✓ | ✓ |
Prices, subscription periods and offers may vary by country, region and Apple account. Check the purchase screen for the current price, any trial, billing and automatic renewal. A trial applies only when offered there. Cancel at least 24 hours before it ends if you do not want to continue.
Guide
For those who want to know more.
From getting started to HRV and your data. Begin with what interests you.
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?
Free to download and use Balance, your personal journal and guided breathing. Longer trends, PDF export and other additional features are part of paid Feelmo Premium.
Do I need an Apple Watch?
Supported Apple Watch records are needed to view those measurements. Balance also appears when suitable data is available. You can use supported personal entries and guided breathing on iPhone.
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?
Health data and Feelmo records are processed on device, without automatic upload to Provider servers. You can delete Feelmo’s local data; resetting Feelmo does not delete Apple Health records. Health storage and sync follow your Apple settings. Optional iCloud sync covers settings only. An export or share you initiate sends selected content to your chosen destination.
Which languages does it support?
The app supports 15 languages, and the website’s core information is available in 15 languages. Translated journal and research articles vary by language; some links lead to English pages.
The full how-to lives in our guide.Open the guide →
Get the App
Review daily records at your own pace.
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.