Mac 
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All-New Design
Not just evolved, transformed.
The largest Apple Watch display yet. New electrical heart sensor. Re-engineered Digital Crown with haptic feedback. Entirely familiar, yet completely new, Apple Watch Series 4 resets the standard for what a watch can be.
Series 4 represents a fundamental redesign and re‑engineering of Apple Watch. From the curved corners of the larger, all‑new display to the architecture of the S4 chip, every detail has been thoughtfully considered. Apple Watch has always been a uniquely personal product. And now it’s even more powerful.
The largest Apple Watch display yet. This is huge.
The display is the defining feature of Apple Watch, and Series 4 pushes it further than ever. The challenge was to make it bigger without noticeably increasing the size of the case or compromising the battery life. Narrower borders enable a viewing area that’s over 30% larger, while a new display technology called LTPO improves power efficiency, helping you get through the day on a single charge.
A better experience all the way around.
Curved corners precisely match the radius of the case, creating a more pleasing, continuous appearance. This also allows imagery and the touch surface to extend to the farthest reaches of the screen.
More information in every millimeter.
To take full advantage of the new dimensions of the display, the entire interface has been redesigned to provide more information with richer detail. The new Infograph watch face can accommodate up to eight complications, so you can see more and do more at a glance.
Digital Crown. A breakthrough reborn.
The Digital Crown was invented to provide an easy way to navigate on Apple Watch without obstructing the display. With Apple Watch Series 4, the mechanism has been totally re‑engineered. Haptic feedback now delivers a precise, click-like feel as you scroll. And a titanium electrode built into the top allows you to use the ECG app simply by touching it with your finger.
A miracle of miniaturization.
Already one of the most intricate systems Apple has created, the Digital Crown on Apple Watch Series 4 adds even more capability into significantly less space. The entire assembly is 30 percent smaller, yet it includes 21 percent more components.
Two sensors. A pair of eyes on your heart.
The optical heart sensor has been part of Apple Watch from the beginning, allowing you to quickly check your heart rate. Thanks to a new electrical heart sensor (made up of an electrode in the Digital Crown and electrodes on the back crystal), you can use the ECG app to generate an ECG, or electrocardiogram, at any time to share with your doctor.
The biggest thinking happens in the smallest spaces.
Optimized in every way, the new Apple Watch is more powerful, yet even thinner than before. And it delivers up to 18 hours of battery life on a single charge.
All-new S4 chip. The S4 is more than just a processor. It’s a complete System in Package (SiP), with the entire system fabricated onto a single component. This architecture allows Apple Watch to pack amazing capabilities into a tiny space. In fact, Apple Watch is the only product in the world that runs completely on a SiP.
Up to 2x faster. This fourth-generation CPU is faster than ever. Apps open more quickly and performance is boosted across the entire system.
50 percent louder speaker. Larger and even more powerful, the Apple Watch Series 4 speaker provides dramatically bigger sound for Siri and Walkie‑Talkie. In addition, the microphone has been relocated to the opposite side to reduce echoes for clearer phone calls.
Proactive Health MonitorPart guardian, part guru.
ECG on your wrist. Low and high heart rate notifications. Fall detection and Emergency SOS. New Breathe watch faces. It’s designed to improve your health every day and powerful enough to help protect it.
Apple Watch Series 4 inspires you to live a healthier life by helping you manage everything from everyday stress to calories burned. At the same time, it monitors your heart rate and lets you know if it detects something of concern. And that sense of security now goes a step further with fall detection and Emergency SOS. The new Apple Watch has your back — as well as your heart.
ECG on your wrist. Anytime, anywhere.
Apple Watch Series 4 is capable of generating an ECG similar to a single-lead electrocardiogram. It’s a momentous achievement for a wearable device that can provide critical data for doctors and peace of mind for you.
Your finger can tell you a lot about your heart.
Electrodes built into the Digital Crown and the back crystal work together with the ECG app to read your heart’s electrical signals. Simply touch the Digital Crown to generate an ECG waveform in just 30 seconds. The ECG app can indicate whether your heart rhythm shows signs of atrial fibrillation — a serious form of irregular heart rhythm — or sinus rhythm, which means your heart is beating in a normal pattern.
Digital Crown Electrode. The all-new Digital Crown contains a titanium electrode that reads the electrical heart impulses in your fingertip.
Back Crystal Electrodes. An ultrathin chromium silicon carbon nitride layer applied to the sapphire crystal reads the electrical heart impulses in your wrist.
Electrical sensors read the beats.
Each beat of the heart sends out an electrical impulse. With the ECG app, Apple Watch Series 4 can read and record these impulses by connecting the circuit between your heart and both arms. The resulting ECG waveform, its classification, and any notes you’ve entered on related symptoms are automatically stored in the Health app on your iPhone. You can share them with your doctor and have a better-informed conversation about your health.
It has your heart in mind.
Unusually high or low heart rates and Irregular heart rhythms (known as arrhythmias) could be signs of a serious condition. But many people don’t recognize the symptoms, so the underlying causes often go undiagnosed. Apple Watch Series 4 checks your heart and alerts you to these irregularities — so you can take action and consult your doctor.
Fall detection.
With the new accelerometer and gyroscope, Apple Watch Series 4 can detect that you’ve fallen. When an incident like this occurs, a hard fall alert is delivered, and you can easily initiate a call to emergency services or dismiss the alert. If you’re unresponsive after 60 seconds, the emergency call will be placed automatically and a message with your location will be sent to your emergency contacts.
Emergency SOS.
Emergency SOS allows you to quickly get help. It calls 911, notifies your emergency contacts, sends your current location, and displays your Medical ID badge on the screen for emergency personnel. And Apple Watch Series 4 with cellular does it all even when you’re away from your phone.
Fill your lungs. Clear your mind.
Taking moments throughout the day to stop, relax, and practice mindfulness can help reduce stress and improve overall health. The Breathe app keeps you centered by taking you through a series of calming breaths. It’s now available as a watch face, so you can bring focus to your day just by raising your wrist.
Ultimate Workout PartnerWorkouts that work harder.
Automatic workout detection. New yoga and hiking workouts. Advanced features for runners like cadence and pace alerts. See up to five metrics at a glance as you precisely track all your favorite ways to train.
Apple Watch Series 4 is more than just a sports watch. It’s like a trainer that understands the ways you work out — from running to yoga to swimming — and puts every metric you need right on your wrist. With innovations from start to finish line, it’s made for the athlete in us all.
Ready for whatever moves you.
Whether it’s training for a marathon or swimming laps at the pool, Apple Watch Series 4 has something for everyone. Now including yoga and hiking, the Workout app works every way you want to exercise. You can set individual goals, measure your calorie burn, and track your progress over time in the Activity app on your iPhone. Ready? Go.
Big steps forward for runners.
With a gentle tap, new pace alerts let you know whether you’re ahead of or behind where you want to be. The new cadence metric lets you see your steps per minute. And rolling miles allows you to see your split for the preceding mile at any time.
Connected gym.
With just a tap, you can pair your watch with compatible gym equipment. So you can keep important metrics like heart rate, speed, and calories in sync between your watch and the treadmill, stair climber, or stationary bike you’re on.
Automatic workout detection.
For most popular workouts, Apple Watch senses when you’re moving and alerts you to start the Workout app. It even gives you credit for the exercise you’ve already started. It will also remind you to end your workout, in case you get distracted when you’re cooling down.
Sweat, surf, and swim proof.
Apple Watch Series 4 is water resistant to 50 meters and tracks both pool and open-water workouts. Turn the Digital Crown to eject water from the speaker using a burst of sound.
Put your game face on.
With room for eight complications, the new Infograph watch face can reflect whatever you’re into, in richer detail than ever. Create your own custom workout face by adding complications like Music, Heart Rate, or whatever else gets your pulse going.
Weather conditions. See the current temperature, the highs and lows for the day, and new indices showing air quality and UV levels.
Music. Get the motivation you need from Apple Music or Apple Podcast streams.
Workout. Put Workout on your watch face and shorten the distance from ready to go.
Heart Rate. See your latest heart rate reading in an instant, or tap the Heart Rate app for deeper heart insights.
Comprehensive Activity TrackerMade to motivate.
New head-to-head competitions. Activity sharing with friends. Personalized coaching. Monthly challenges. Achievement awards. Get all the motivation you need to close your Activity rings every day.
Understanding all the ways you move throughout the day is an essential part of living a healthy life. Apple Watch shows your daily movement as three simple metrics: Move, Exercise, and Stand. Together they make up the Activity rings that track your progress all day long. The goal is to close your rings each day.
Challenge yourself by challenging a friend.
Apple Watch lets you share your activity progress from the trail, the track, or even the surf lineup. And now, new Activity competitions let you invite a friend to a seven-day contest where you earn points based on the percentage of your daily Activity rings you close.
A little coaching goes far.
During a competition, notifications will tell you if you’re ahead of or falling behind your competitor, along with the score. So you’ll know exactly how much you need to move to take home bragging rights. And like a personal trainer, Apple Watch will give you a nudge to close your rings at the end of each day, as well as offer up a new challenge each month.
Hardware for your hard work.
Now you can pick up a trophy when you seize a victory. You’ll find your competition award in the new Awards tab inside the Activity app on your iPhone.
Easy Ways to ConnectThe freedom of cellular.
Walkie-Talkie, phone calls, and messages. Stream Apple Music and Apple Podcasts. New ways to use Siri. Built-in cellular lets you do it all on your watch — even while you’re away from your phone.
Take a call from the trail. Check in with a buddy over Walkie-Talkie. Keep your workouts going by streaming Apple Music. Or raise your wrist and ask Siri to order your usual. Apple Watch Series 4 with cellular makes it easy to stay connected to the people and information you care about most. Even when you don’t have your phone.
Call and text with just your watch.
Built-in cellular lets you go with just your watch. Take calls, send texts, listen to voicemail — Apple Watch Series 4 with cellular keeps you connected no matter where you go.
Information about Apple Watch Series 4
- Wireless service plan required for cellular service. Apple Watch and iPhone service provider must be the same. Not all service providers support enterprise accounts; check with your employer and service provider. Roaming is not available outside your carrier network coverage area. Contact your service provider for more details. Check www.apple.com/watch/cellular/ for participating wireless carriers and eligibility.
- Apple Music requires a subscription.
- Some bands are sold separately.
- Apple Watch Series 4 (GPS + Cellular) requires an iPhone 6 or later with iOS 12 or later. Apple Watch Series 4 (GPS) requires an iPhone 5s or later with iOS 12 or later. Apple Watch Series 3 (GPS + Cellular) requires an iPhone 6 or later with iOS 11 or later. Apple Watch Series 3 (GPS) requires an iPhone 5s or later with iOS 11 or later.
- Features are subject to change. Some features, applications, and services may not be available in all regions or all languages. Click here to see complete list.
