Apple Watch App

The 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.

Its most important job is simply to be worn while you sleep at night. From the heartbeat variability gathered during that sleep, your next morning's Balance score is born. No complicated steps are needed. Just wear it and sleep — that alone makes for the most stable data.

Your Balance score is born from the "flutter" of your heartbeat

The Balance score is an estimate of how balanced your autonomic nervous system is, drawn from the HRV (heart rate variability / the fluctuation in your R-R intervals) that your Apple Watch reads. Your heart may feel like it beats in a steady rhythm, but in reality the interval between beats is constantly stretching and shrinking ever so slightly. The size and quality of this flutter reflect the current state of your autonomic nervous system.

• The score is a continuous value from 0 to 100 — low means more unsettled, high means more balanced. It's a gentle gauge, nothing more.
• It summarizes multiple HRV-derived clues, measurement quality, and movement from your own baseline. The exact internal recipe is not public.
• What matters is not comparing yourself with anyone else, but reading it as the difference from your own "usual" (baseline).

For a deeper look at how it works, see Balance score; to learn about HRV itself, read Getting to Know HRV.

Its most important job is simply to be worn while you sleep

Your Balance score is read mainly from your heartbeat data during sleep. The wrist sensor is sensitive to body movement, so when you walk or move your hands during the day, the data tends to come in patchy. But while you sleep your body is still, so the most stable flutter is recorded.

1. At night, you fall asleep with your Apple Watch on (no special setup needed).
2. The Watch reads your heartbeat during sleep, and Feelmo on your iPhone quietly reads it over again.
3. The next morning, when you open the app, today's Balance score and companion — grown from that night — are waiting for you.

It's perfectly fine if you had a night of poor sleep, or a night you forgot to wear it. Your balance grows little by little as it learns your "usual," and a single missed day won't throw it off. For more on how it grows, see How Your Balance Grows.

What you can see at a glance on your wrist

Open the Watch app and you can check a short summary of how you are right now. Without reaching for your iPhone, you can gently touch in with today's condition from your wrist alone.

• Today's Balance score and companion … your latest score, and the face that fits it best
• A short clue … a simple breakdown of your balance — a gentle gauge of whether you're leaning balanced or leaning unsettled right now
• Start breathing on your wrist … begin a breathing session right where you are, choosing from six guided breathing methods that range from calming to energizing. A recommended one-tap session gets you started, and an "other methods" picker lets you switch — all without reaching for your iPhone.
• Your current heart rate … your heartbeat at this moment

For detailed records, reflections, and long-term trends, look in the Feelmo app on your iPhone. It feels natural to think of the Watch as "a window to gently touch this very moment" and the iPhone as "the mother ship that watches over you at length."

A complication for your watch face

You can place your Balance score as a complication on your favorite watch face. While you check the time, you can quietly sense today's companion and balance at the same time. You can also place other complications to suit your face — your companion, a breathing shortcut, a glance at your sleep or your trend, or a small today's-summary — so choose whichever feels right.

• Press and hold the watch face to enter editing, then choose Feelmo for a complication slot.
• The available positions and sizes vary by the type of watch face.
• Even without opening it many times a day, "the current you" can sit gently at the edge of your vision — that's the kind of use this allows.

You can keep watch in the same way from your iPhone's Home Screen too. Take a look at Watching Over with Widgets as well.

Battery and wearing tips

To wear it while you sleep at night, it matters that your Watch still has battery at bedtime. Putting your daytime "time off the wrist" to good use as charging time lets you fall asleep naturally with it on at night.

• Charge during the day … times you'd already have it off — like during a shower or bath — are great for getting your charging done. Making a short charge a daily habit keeps your nightly data from breaking up.
• Fit it just right … not too tight, not too loose. If the fit is loose, the sensor lifts off your wrist and your nighttime heartbeat data can come in patchy. Aim for just above the wrist bone, with about a finger's width of room.
• One more check before bed … a habit of glancing once before sleep to confirm "it's on" and "there's battery left" brings peace of mind the next morning.

When your balance doesn't arrive

If your balance doesn't appear in the morning, don't worry — just check the following. In most cases it's something small.

• Were you able to sleep with the Watch on overnight? … on a night it was charging, there's no data for that night.
• Was the fit too loose? … if it lifted off, the heartbeat can't be read well, and sometimes the flutter can't be estimated.
• Are your iPhone and Apple Watch paired and nearby? … if they're far apart, the handoff of data can sometimes fail.
• Have you only just started using it? … your Balance score takes about two weeks to learn your "usual." While it's still growing, the display may be modest (How Your Balance Grows).

If it still doesn't arrive, see Apple Watch and HealthKit and On a Morning Your Balance Doesn't Arrive. You can gently check, step by step, whether something is stuck somewhere along the path the data travels — from the Watch to HealthKit, and on to Feelmo.