Apple Unveils Apple Watch Series 4 With 30 Percent Larger Display, Thinner Body, ECG Reader, Fall Detection, and More

Apple announced new Apple Watch models at its Gather Round event today at the Steve Jobs Theater in Apple Park, Cupertino. The Apple Watch Series 4 will be available in 40mm and 44mm sizes – a step up from the 38mm and 42mm options of previous models – has a thinner body, and comes with a number of next-generation medical heart detection features approved by the FDA.

apple watch series 4
The new models have screens that are 30 percent larger than previous versions and, combined with a new user interface, allow watch faces to display up to eight complications, while native apps can show more information.

The Digital Crown has been re-engineered to include haptic feedback for better tactile responsiveness, the built-in speaker is 50 percent louder, and the microphone has been relocated, to reduce echo for better sound quality.

Meanwhile, new heart detection features, made possible via a new electrical heart sensor, include the ability to perform electrocardiogram (ECG) readings right out of the box, as well as detect low heart rhythm with background detection for atrial fibrillation, and low heart rate monitoring to detect very low blood flow from the heart.

The back of the Series 4 is made entirely of ceramic and sapphire crystal, with radio waves able to pass more freely through the front and rear, enabling better reception when using cellular functions. Despite the new tech, battery life remains on average the same as the previous generation Apple Watch, while running enthusiasts can now look forward to six hours' battery life when using outdoor workouts.

apple watch series4 gold stainless steel 09122018
A new 64-bit Dual Core S4 processor provides up to 2x faster performance over previous generation models, and faster accelerometer and gyroscope technologies allow for better sensitivity, including the ability to detect a physical fall.

By analyzing wrist trajectory and impact acceleration, the Apple Watch Series 4 sends the user an alert after a fall, which can be dismissed or used to initiate a call to emergency services. If the device senses immobility for 60 seconds after the notification, it will automatically call emergency services and send a message along with location to emergency contacts.

With watchOS 5, Activity competitions allow users to challenge other Apple Watch wearers, automatic workout detection provides an alert to start a workout while giving retroactive credit, and Yoga and Hiking are new dedicated workout types that accurately track active calories burned and exercise minutes earned.

Meanwhile, Apple Watch owners can reach their friends with a tap of the wrist with Walkie-Talkie, a watch-to-watch connection exclusive to watchOS 5 that allows communication around the world over Wi-Fi or cellular.

The 40mm and 44mm Apple Watch models come in GPS and GPS + Cellular versions, in Silver, Space Gray, and Gold aluminum case options, and stainless steel options in Silver, Space Black, and Gold (with matching Milanese band).

apple watch series4 ecg crown 09122018
A new Nike+ collection for Series 4 features redesigned Nike watch faces, which match to the new band colors, including a Pure Platinum/Black Sport Band and a Summit White Sport Loop with reflective yarn. Meanwhile new Hermès variants introduce an assortment of color-blocked bands and watch faces that shift from one color to the other with the passage of the minute hand.

Apple Watch Series 4 pricing starts at $399 for GPS and $499 for LTE, while the Series 3 continues to be available but at the new lower price of $280. Orders for the new models and new bands open Friday, September 14, with availability beginning Friday, September 21, in Australia, Canada, China, Denmark, France, Germany, Hong Kong, Italy, Japan, Singapore, Spain, Sweden, Switzerland, the UAE, UK and US, with other countries later this year.

Related Roundup: Apple Watch 11
Buyer's Guide: Apple Watch (Neutral)

Popular Stories

Apple Logo Zoomed

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by
Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...
Finder Siri Feature

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by
In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...
iOS 26

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by
While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...
iphone 17 pro dark blue 1

iPhone 18 Pro Max Rumored to Deliver Next-Level Battery Life

Friday February 6, 2026 5:14 am PST by
The iPhone 18 Pro Max will feature a bigger battery for continued best-in-class battery life, according to a known Weibo leaker. Citing supply chain information, the Weibo user known as "Digital Chat Station" said that the iPhone 18 Pro Max will have a battery capacity of 5,100 to 5,200 mAh. Combined with the efficiency improvements of the A20 Pro chip, made with TSMC's 2nm process, the...

Top Rated Comments

nviz22 Avatar
97 months ago
Gotta hand it to Apple, they really are pushing some good health related functions w/ the Series 4.
Score: 34 Votes (Like | Disagree)
dojoman Avatar
97 months ago
Shut up and take my money.
Score: 22 Votes (Like | Disagree)
zakarhino Avatar
97 months ago
Was happy with my Series 2 but the ECG alone has me interested in an upgrade.
Score: 21 Votes (Like | Disagree)
nezr Avatar
97 months ago
I was hoping for better sleep tracking :(
Score: 17 Votes (Like | Disagree)
BMcCoy Avatar
97 months ago
Okay, this is good.
The watch is really evolving into a useful medical device.

ECG lead 1 isn't going to replace a full 12-lead ECG, but by golly it's a damn fine start!

I won't be buying one, but I like the direction they're going in...

(I'm a doc)
Score: 16 Votes (Like | Disagree)
BillGates1969 Avatar
97 months ago
So the fall detection does what?

Tell you later that you fell?
Tells you it is no longer summer.
Score: 13 Votes (Like | Disagree)