Feelmo Guide

From reading your Balance score to the science of HRV and setting up Apple Watch. Start anywhere.

Getting StartedFeelmo 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.
Supported LanguagesFeelmo is built so that as many people as possible can use it in their own words. Feelmo isn't an app that tries to guess your emotions; it's a daily companion that gently watches over the balance of your autonomic nervous system. That's exactly why we want every word and every sentence on the screen to feel like your own — the kind of language that lets your shoulders relax.
Everyday UseFeelmo isn't an app you have to work hard at. Wear your Apple Watch to sleep at night, and gently open the app in the morning — that's all it takes for your daily balance to quietly build up, day after day.
Your First WeekFeelmo isn't an app that hands you the "right answer" right away. The first week is a time for Feelmo to get to know you, and for you to get used to Feelmo. Feelmo isn't an app that guesses your emotions—it's a companion that gently watches over the balance of your autonomic nervous system, day by day. Here, we'll walk you through what happens over those first seven days, one step at a time.
How to read the screensFeelmo is a gentle daily companion for watching over the balance of your heart and mind. It isn't an app for "guessing your emotions." So you can use it without memorizing any difficult numbers, the screens are kept to the bare minimum. What you'll touch every day is five tabs (Home, Mood Log, Breathing, Trends, Wellbeing) and the Settings that support them. On this page, we'll walk you slowly through what you can see on each screen, and how to read it.
Apple Watch & HealthKitFeelmo's Balance score — your daily measure of inner balance — is born from the heartbeat fluctuations (HRV) that your Apple Watch reads. On this page we'll walk through, one step at a time, how to set things up at the start, how Feelmo reads your data, and what to do when the numbers don't quite appear. There's nothing complicated to configure. Once you've set it up, all that's left is to wear your Watch and go about your day.
Health App DataFeelmo fully discloses what data it exchanges with Apple's Health app (HealthKit). What we read, what we write, and what we don't touch — we believe trust begins right here.
Apple Watch AppThe Feelmo Apple Watch app is a small companion that quietly watches over your daily 【balance】 right from your wrist. Feelmo isn't an app that tries to guess your emotions — it's a daily companion that gently keeps pace with the ebb and flow of your autonomic nervous system (how balanced you are). The Apple Watch on your wrist is your entry point into that.
Notifications and RemindersFeelmo's notifications aren't here to rush you. They quietly let you notice today's balance, so you can drop by for some breathing or journaling only when you need to. We care more about leaving you in peace than about chiming at you. That's why, by default, we keep the number of notifications to a minimum.
Keeping Watch with the WidgetWithout having to open the app at all, you can gently check in on your "companion of the moment" and your balance right from a Home Screen widget. Instead of launching the app many times a day, you can simply glance at how you're doing whenever it catches your eye — this feature is here for that kind of soft, caring check-in.
Getting the Most from Mood LogThe "Mood Log" is where your days quietly gather — each one recorded automatically from the fluctuations of your heartbeat, then laid over the same timeline as your body's balance. Among the app's five tabs, the Mood Log tab is your way in.
Balance scoreThe Balance score is a measure that, from the heartbeat fluctuations (HRV) your Apple Watch reads, estimates how well-balanced your autonomic nervous system is and shows it continuously on a 0–100 scale. It doesn't try to guess your mood or emotions. Instead, it's a gentle yardstick that reflects how settled or unsettled your body is right now.
Until Your Balance Grows InYour Balance score (your heart's sense of balance, 0–100) isn't "all about you" right from the start. Before Feelmo has carefully finished learning what "normal" looks like for you, there's a growing-in period of about two weeks. This page walks through what's happening during that time, how the display changes along the way, and how to read it.
Your Morning Balance, and Getting Ready for TomorrowA Feelmo day begins with a single morning breath. While you sleep, your body is quietly re-tuning its autonomic nervous system — its balance — and by morning Feelmo has already set down the night's reading for you. There's nothing to pick or type: the morning is simply a moment to receive that reading. Here we'll walk slowly through how to read your morning balance, along with Feelmo Premium's "Getting Ready for Tomorrow" (the tomorrow condition forecast).
Condition ForecastThe Condition Forecast ("tomorrow's prep") in Feelmo Premium weaves in tonight's sleep to gently look ahead at the next morning you'll wake into, and estimate its balance. It appears on Home as the "Tomorrow's forecast" card. After the overview in "Your morning balance and getting ready for tomorrow," this page unpacks how to read that card.
Understanding Heart Rate Variability (HRV)This page takes a closer, source-backed look at HRV (Heart Rate Variability), the starting point for Feelmo. It gets a little technical, but it's written for anyone who wants to understand the meaning of your Balance score more deeply. By the time you finish, it should click into place why Feelmo looks not at the heartbeat itself but at "the fluctuation between beats," and how to read your own numbers.
The Science of BalanceHere is a summary of the science behind Feelmo, with sources. The fine details of the algorithms that make up your score are not public, but the ideas they rest on stand on published, peer-reviewed research.
The Brain–Heart Connection"Balance" isn't only about the heart. The variability of your heartbeat (HRV) is also a window into how the brain keeps the body balanced. On this page, we'll walk slowly through the brain–heart connection with sources cited, and at the end we'll share how Feelmo works with it.
Sleep and HRVThere's a clear reason why Feelmo's Balance score is born mainly from your heartbeat during sleep. On this page, we walk carefully through the relationship between sleep and HRV (heart rate variability), with references, and share how Feelmo translates that night's data into "balance."
Exercise, Recovery & ReadinessExercise is deeply connected to the balance of mind and body. When you move, your autonomic nervous system stirs; when you rest, it returns — and this very back-and-forth can be observed in the form of HRV (heart rate variability). On this page, we gently explain the relationship between exercise and HRV, with sources, and introduce how Feelmo watches over it.
Heart Rate and Resting Heart RateAlongside HRV (the "fluctuation" in your heartbeat), another fundamental measure is your heart rate (HR). Even though both look at the same heart, they tell you completely different things. On this page, we'll walk through how to read your heart rate and resting heart rate, gently and with sources. There's no need to overthink it — all that matters is "how am I doing compared to my usual self?"
Age, Sex, and Individual DifferencesWhat counts as "normal" for HRV (heart rate variability) varies enormously from one person to the next. Age, sex, constitution, the rhythm of daily life—many factors mean that even among healthy people, the numbers come out very differently. That's why Feelmo doesn't decide whether you're "high" or "low" by comparing you to someone else; instead, it watches over your own baseline. On this page, we gently explain why we do it this way, along with the scientific background and its sources.
Common MisconceptionsHRV (heart rate variability) and your Balance score are wonderfully useful, but they're also easy to misread. When a number takes on a life of its own, you might end up blaming yourself ("it's low today, so this is a bad day") or feeling down comparing yourself to others — the opposite of what these numbers are really for.
Your Six CompanionsFeelmo never just hands you a number on its own. The Balance score (0–100) it reads from your Apple Watch is first translated into the expressions of six companions, and gently placed right beside the score. "Which one are you closest to today?"—it's a little window for looking kindly at where you are right now.
Breathing SessionsThe "Breathing" tab is a place to gently support the balance of your autonomic nervous system in just a few minutes. It offers 6 kinds of guided breathing techniques you can choose from depending on how you feel — so you can find, at your own pace, "which breathing felt good for me, right now."
Mindfulness and HRVIt's not just breathing — mindfulness and meditation, those "habits for settling the mind," have also been studied in relation to HRV (heart rate variability). On this page, we explain that relationship as carefully as we can, with sources. From there, we'll also gently walk you through how Feelmo watches over this habit, and how to read what it shows you.
Well-being and HabitsThe "Well-being" tab is a gentle place that brings together your daily life and the connection it has with the balance of your inner world, all on a single page. Habits like sleep, sunlight, steps, and respiratory rate are recorded automatically and gently from your Apple Watch and iPhone, and little by little, you begin to see how they nestle alongside your Balance score.
Habit Association Patterns (Premium)Habit Association Patterns compares your next-morning Balance on days with a habit against days without it, using only your own records. It shows correlations in those records; it does not prove that the habit caused an effect.
About Feelmo PremiumAt the heart of Feelmo Premium is tomorrow's condition forecast — when there is enough data, it shows a range for tomorrow morning's Balance based on patterns in your own past records. It is a cue for planning your pace, not a promise of accuracy or a diagnosis.
On Mornings When Your Balance Doesn't ArriveIn the morning, your heart's balance score isn't showing up, or your companion (character) is still stuck as the "waiting for data" one — when that happens, here are the things we'd like you to check, gently and in order.
Data & PrivacyFeelmo is designed on the principle that data about your body exists to be observed — never to be bought and sold for guessing.

Feelmo Guide | Feelmo