Getting Started

Feelmo is an iOS app that uses the heart-rate variability (HRV) read by your Apple Watch to gently watch over your autonomic balance every day. It is not an app that "guesses your emotions." It doesn't decide what's good or bad. Instead, it quietly translates "how well today's you is balanced, compared with your usual self" into the faces of six companions and sets them beside you.

This page walks you through your first setup, and what to expect over the first few days, slowly and step by step. There are no difficult settings. At its core, you just "wear it and go about your day as usual" — wear it to bed, and your "balance" arrives the next morning; the longer you keep it up, the more tomorrow's condition comes into view, like a forecast.

Requirements

• An iPhone running iOS 17.0 or later
• Reading your Balance score requires an Apple Watch. Your HRV and heart rate during sleep are recorded while you're wearing the Apple Watch
• 11 languages are supported: Japanese, English, German, French, Spanish, Italian, Korean, Portuguese (Brazil), Thai, Simplified Chinese, and Traditional Chinese. The display language follows your device's settings (for details, see Supported Languages)

Setup at a glance

1. Download Feelmo from the App Store

Get Feelmo from the App Store (coming soon). After installing, open the app and follow the on-screen guidance. You can start using it right away, with no account registration required.

2. Allow access to HealthKit

The first time you launch the app, it will ask for access to HealthKit (the Health app) all at once. Feelmo asks just once, at the start, for the items it may use to watch over your balance: HRV, heart rate, sleep, wrist temperature, respiratory rate, and blood oxygen (SpO₂). It won't suddenly ask for more later.

• You can choose permissions item by item. It's fine to leave out only the ones you'd rather not share (the card for that item simply won't appear)
• You can revoke or change permissions at any time from your iPhone, in "Settings → Privacy & Security → Health → Feelmo"
• For details, see Connecting Apple Watch and HealthKit

3. At night, just wear your Apple Watch to sleep

Balance is read most reliably during sleep, and while you're sitting quietly and at ease. Wrist sensors are less accurate while you're moving your body, so Feelmo cherishes the signals from your calm, still moments.

When you wear your Apple Watch to sleep at night, the next morning's balance is born from the heart-rate variability measured during your sleep. No special actions are needed. You just go about your day as usual.

Your first morning

In the morning, when you open the app, the Home (Today) tab greets you with one of the six companions—Genki (lively), Odayaka (calm), Futsuu (steady), Fuan (uneasy), Panku (overloaded), or Tsukare (worn out)—who gently tells you how your body was balanced last night.

On Home, you can see things like:

• The balance gauge … shows your current balance, with an aura that reflects how far you are from your baseline
• Vital sign cards … the latest values for HRV, resting heart rate, and sleep. These are "everyday signals," not diagnoses (more detailed vitals such as wrist temperature, respiratory rate, and blood oxygen (SpO₂) live on the Well-being tab)
• Stress level, and your current HRV and state

There's no need to fret over the numbers themselves. To start with, simply receiving "which companion today is" is enough.

How your Balance score works (in brief)

Your Balance score (0–100) is calculated from the Apple Watch-derived HRV (heart-rate variability / the fluctuation in R-R intervals). At its heart are multiple HRV-derived clues, measurement quality, and movement from your own baseline. Lower tends to mean "more unsettled," and higher tends to mean "more balanced." Rather than putting this number front and center, Feelmo translates it into the closest of the six faces and quietly sets it beside you each day.

What you can do in the first few days

Once setup is done, we recommend getting comfortable with Feelmo along the following flow. The features are organized into five tabs (for a detailed map, see How to read the screens).

• Home … today's balance gauge, vital signs, stress, and your recent balance-change (the colorful look-back at your moods lives on the Trends and Mood Log tabs)
• Journal … your mood is auto-recorded each day, ready to look back on in a calendar and a graph — the mood itself is final, but you can add a casual word to any day whenever you like
• Breathing … guided breathing (six techniques) for when you want to calm down, or to lift yourself up (Breathing Sessions)
• Trends … the flow of your balance, autonomic state, and HRV, from days to years
• Well-being … sleep, sunlight, activity, and habit-impact on one screen, and their relationship with your balance

When you want to watch over yourself more deeply

Even on the free plan, today's balance and state, the six faces, the Mood Log (calendar), breathing (all six techniques), today's habits, and the weekly view remain available forever.

When you want to go further — all the way to "tomorrow's condition, clear like a weather forecast for your body" — there's Feelmo Premium. Premium unlocks tomorrow's condition forecast (which settles into your own tendencies the more you use it — not a matter of being right or wrong), long-term trends (balance, autonomic, HRV), the habit-impact analysis — Which habits help you, in the Kokoro Report's "This week's insight," seeing whether things like breathing actually work "for you" — reports and a yearly review (with PDF and shareable cards), and your full history (up to a year), among others (for details, see Feelmo Premium). There's no need to rush in. To begin with, try just meeting your morning companion for a few days — and for a relaxed picture of how Feelmo settles into the flow of a single day, see Everyday Use.