As Featured On
Designed with perfection in mind.
Curved AMOLED Display
Crafted with precision and attention to detail.
Health Button
Double-press for a health check. Press to start workouts. Hold for SOS.
Crown
Scroll and control fast. Press for Home, double-press to jump apps, hold for voice assistant.
Side Button
Instant Control Center, your quick settings without leaving what you’re doing.
Sensors
16 biometric and environmental sensors.
Speaker/Mic
Weather-sealed speaker and mic
HEALTH
Heart rate monitor.
Heart changes don’t always show up when you decide to check. Health 4 monitors in the background and alerts you when your heart rate is unusually high, low, or irregular. It also screens for atrial fibrillation, AFib, a common irregular heartbeat that can come and go, so you can get a heads up even when you feel fine.
Sleep tracking.
Sleep quality is shaped by how long you sleep, how consistent your bedtime is, how often you wake up, and how much time you spend in each stage. Health 4 tracks your cycles, including REM, light, and deep sleep, so you can see what made your sleep better or worse.
Hypertension monitoring.
Blood pressure is one of the most important numbers for long-term health, and most people only see it occasionally. Health 4 lets you take readings and view trends over time.
Cycle tracking.
Log your period and symptoms, get phase predictions, and see ovulation and fertile-window estimates for planning. It also flags cycle deviations when something shifts from what’s normal for you.
Metabolic analysis.
Understand how your body is using energy throughout the day. Metabolic Analysis helps you see patterns in activity, recovery, and energy use, so you can make more informed decisions about exercise, rest, and overall health.
Temperature monitoring.
Temperature shifts can be an early clue that your body is under strain or still recovering. Track both skin and body temperature trends over time, and see when you move outside your normal baseline.
Blood oxygen monitoring.
When you are sick, stressed, or recovering, oxygen levels can be a useful signal. Health 4 monitors blood oxygen so you can spot dips and check how your body is responding day to day.
Respiratory rate monitoring.
Your breathing at night tells a lot. Track your respiratory rate over sleep and spot when it drifts from your usual pattern.
MENTAL HEALTH
Stress monitoring.
Stress does not always feel obvious until it wrecks your sleep and focus. Health 4 watches your stress signals through the day and shows a clear trend, so you can see what ramps you up and what actually brings you down.
Emotional state monitoring.
Health 4 tracks your emotional state using pulse wave and heart rate variability (HRV) analysis. You get simple mood alerts like positive, peaceful, or negative so you can understand your psycho-emotional well-being and spot patterns over time.
Guided breathing exercises
When you need a reset, start a breathing session from your wrist. Follow the guided rhythm for a few minutes to slow down, settle your body, and get back to your day.
Medication reminders.
Stop second-guessing. Set simple reminders on your wrist, then mark meds as taken in seconds so you stay consistent even on busy days and keep your mind calm instead of stressing about whether you missed a dose.
RUNNING
Advanced running insights.
During the run, Health 4 shows the signals that let you adjust in real time: live pace, distance, heart rate zone, and how steady your effort is so you stop training blind.
Zone focused training.
If you are trying to build speed or endurance, the zone matters. Health 4 tracks your heart rate live and keeps you in the right zone so easy runs stay easy and hard runs actually push you.
Dual frequency GPS accuracy.
If GPS drifts, your splits lie. Health 4 uses dual frequency GPS to lock onto a cleaner position so pace and distance stay accurate in cities, under trees, and on turns.
Altitude monitoring
Hills change everything. Health 4 tracks elevation gain so you can pace climbs, compare routes, and measure progress on inclines.
Barometric pressure monitoring.
Pressure changes can affect how a run or ride feels, especially outdoors. Health 4 monitors barometric pressure and logs it with your workout, so you can explain “why this felt harder” days and compare sessions more fairly over time.
Post run insights.
Health 4 shows what the run actually did to your body, then makes the next step obvious for you.
Full route replay.
See your full run mapped after you finish so you can review the route, compare sessions, and spot where you faded or surged.
CYCLING
Advanced ride insights.
When you are riding, you need feedback you can act on, not charts for later. Health 4 shows live pace and distance, your current heart rate zone, and real-time elevation gain, and more, so you can adjust effort on the spot instead of realizing it after the ride.
Zone focused training.
Zone training only works if you stay in the zone. Health 4 tracks your heart rate live, shows your current zone on screen, and nudges you when you drift so your easy rides stay easy, and your hard rides actually count.
Altitude monitoring.
Elevation that matches the climb. GPS elevation can be sloppy, especially on rolling terrain. Health 4 uses barometric altitude tracking to measure elevation changes more cleanly, so your climbs and total elevation gain reflect what you actually rode.
Barometric pressure monitoring.
Weather shifts change how rides feel and how your body responds. Health 4 tracks barometric pressure changes alongside your effort so you can explain those “why was this ride harder than usual” days with data, not guesswork.
Post ride insights.
Most people finish a ride and still do not know what it did for them. Your improvement happens after you stop. Health 4 shows how your ride affected recovery so you can decide whether the next day should be another push or a rebuild.
Full route replay
See your full ride mapped after you finish, so you can review the route, compare sessions, and spot where you faded or surged.
CONNECTIVITY
Calling
Stop digging for your phone when you are busy or your hands are full. Answer quickly from your wrist and stay reachable without breaking your flow.
Smart Notifications
Calls, texts, and app alerts show up instantly. Scroll through notifications with the crown so you never miss what matters.
Voice Assistant
Hands-free help, on demand. Press and hold the crown to open the voice assistant and get things done without stopping what you are doing.
Music control
Music control, without pulling out your phone. Skip, pause, and change volume mid-workout or mid-commute without losing focus.
Weather forecast
Weather at a glance. Check the forecast before you step out so your day does not get derailed. See the temperature, chance of rain, and UV index in one glance.
Find my phone
Find your phone fast. If your phone disappears into a bag, a sofa, or a car seat, you can ping it in seconds.
SAFETY
Emergency SOS
If something feels wrong, the last thing you want is menus. Press and hold the side button to open Emergency SOS, and keep holding to auto call for help.
Compass
Compass logs your path as you go; one tap lays a breadcrumb trail back to camp. Phone or no phone.
Return navigation
Find your way back. Health 4 auto-logs your route and guides you step-by-step in reverse, phone-free, so you get back to safety with certainty.
Danger zone alerts.
Set custom thresholds for all health metrics, so you can take a break or seek help. Stop before “not feeling right” becomes an emergency. (Informational alerts, not a diagnosis.)
UV index
Get real-time UV updates that help you stay safer in the sun. Whether you’re exercising, commuting, or spending time outdoors, UV Index Monitor helps you recognize when exposure is higher so you can use sunscreen, seek shade, and protect your skin.


































