Apple Watch Series 4 Hands-On: Larger Displays, New Finishes, Slightly Thinner, ECG, and More

Following the introduction of Apple Watch Series 4 models at Steve Jobs Theater today, MacRumors and other media outlets were provided with some up-and-close hands-on time with the new lineup.

series 4 8
At first glance, the most obvious difference with Series 4 models is their larger displays, as Apple has significantly reduced the size of the bezels around the screen. The bezels now look similar to those on the iPhone X and newer, although the display is not completely edge to edge.

Apple says the larger displays provide 32 percent and 35 percent more viewing area on the new 40mm and 44mm models respectively, compared to the previous 38mm and 42mm models in previous generations.

series 4 2
Taking advantage of the larger displays, Apple has redesigned the entire watchOS interface to provide more information with richer detail. A new Infograph watch face can accommodate up to eight complications.

Series 4 models are also ever slightly thinner than Series 3 models, measuring in at 10.7mm, compared to 11.4mm. Apple didn't allow me to test my Series 3 band with a Series 4 model, but it did confirm that both new and existing bands are compatible with all Apple Watch generations.

series 4 4
Apple Watch Series 4 has a new electrical heart sensor on the back side for electrocardiography, often shortened to ECG or EKG. This potentially life-saving functionality can indicate whether your heart rhythm shows signs of atrial fibrillation, a serious form of irregular heart rhythm.

Series 4 introduces some finishes, including gold stainless steel casing and a gold Milanese Loop. The back side on all the new models is now crafted from sapphire crystal and ceramic, whereas some Series 3 models had composite backs.

series 4 3
On the side of Series 4 models, the Digital Crown features a thin circle, which is black on GPS configurations and red on LTE configurations. By comparison, nearly the entire Digital Crown is red on Series 3 models with LTE. In my opinion, the new, subdued look of the crown is more aesthetically pleasing.

series 4 5
series 4 7series 4 1
series 4 6
Overall, the Series 4 models do not represent a full-out redesign of the Apple Watch, but the larger displays and improved health monitoring tools are much welcomed features that are worth considering upgrading for.

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

Popular Stories

iOS 26

iOS 26.1 Coming Soon: New Features for Your iPhone and Release Date

Monday October 27, 2025 7:55 am PDT by
The upcoming iOS 26.1 update includes a handful of new features and changes for iPhones, including a toggle for changing the appearance of the Liquid Glass design, "slide to stop" for alarms in the Clock app, and more. Below, we outline key details about iOS 26.1. Release Date Given that Apple has yet to seed an iOS 26.1 Release Candidate, which is typically the final beta version, the...
iOS 26

6 New Things Your iPhone Can Do in iOS 26.1

Wednesday October 29, 2025 4:22 am PDT by
Apple is about to drop iOS 26.1, the first major point release since iOS 26 was rolled out in September, and there are at least six notable changes and improvements to look forward to. We've rounded them up below. Apple has already provided developers and public beta testers with the release candidate version of iOS 26.1, which means Apple will likely roll out the update to all compatible...
maxresdefault

Apple TV 4K Could Still Launch Before 2025 Ends: All the Rumored Features

Monday October 27, 2025 4:51 pm PDT by
Apple is designing an updated version of the Apple TV 4K, and rumors suggest that it could come out sometime in the next couple of months. We're not expecting a major overhaul with design changes, but even a simple chip upgrade will bring major improvements to Apple's set-top box. Subscribe to the MacRumors YouTube channel for more videos. We've rounded up all the latest Apple TV rumors. ...
iOS 26

Apple Seeds iOS 26.1, iPadOS 26.1, and macOS Tahoe 26.1 Release Candidates

Tuesday October 28, 2025 1:07 pm PDT by
Apple today provided developers and public beta testers with the release candidate versions of upcoming iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, watchOS 26.1, and visionOS 26.1 updates for testing purposes. The RCs betas come a week after Apple released the fourth betas. The new betas can be downloaded from the Settings app on a compatible device by going to General > Software...
M6 MacBook Pro Feature 1

M6 MacBook Pro: Release Date, Pricing, and What to Expect

Monday October 27, 2025 9:15 am PDT by
Apple this month refreshed the 14-inch MacBook Pro base model with its new M5 chip, and higher-end 14-inch and 16-inch MacBook Pro models with M5 Pro and M5 Max chips are expected to follow in early 2026. However, these machines will represent the final update to the current design, with Apple reportedly developing a completely new version of the MacBook Pro packed with next-generation hardware...
iPhone 17 Pro Cosmic Orange

8 Reasons to Wait for Next Year's iPhone 18 Pro

Thursday October 30, 2025 4:42 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
macos tahoe

Here Are Apple's Release Notes for macOS Tahoe 26.1

Tuesday October 28, 2025 1:21 pm PDT by
Apple today provided developers and public beta testers with the release candidate version of macOS Tahoe 26.1, which means the update will likely see a public launch next week. The release candidate includes notes on what's in the update, so we have a full picture of the new features that Apple has included. macOS Tahoe 26.1 adds AutoMix support over AirPlay, improved FaceTime audio...
ipad mini 7 feature blue

OLED iPad Mini: Release Date, Pricing, and What to Expect

Wednesday October 29, 2025 7:13 am PDT by
Rumors are stoking excitement for the next-generation iPad mini that Apple is reportedly close to launching. So what should we expect from the successor to the iPad mini 7 that Apple released over a year ago? Read on to find out. Processor and Performance Apple is working on a next-generation version of the iPad mini (codename J510/J511) that features the A19 Pro chip, according to...
iPhone Car Key Kia

Another Vehicle Brand Gaining iPhone Car Keys Support

Tuesday October 28, 2025 5:27 am PDT by
Apple is preparing to bring support for its digital car key feature to Jetour vehicles, according to evidence uncovered on Apple's backend by MacRumors contributor Aaron Perris. Introduced in 2022, Car Keys allows an iPhone or Apple Watch to unlock a vehicle through the Wallet app. A digital version of a car key is stored in Wallet, and unlocking can be done by holding an Apple Watch or...

Top Rated Comments

dtich Avatar
93 months ago
Huge Apple product user here... Apple Watch was my main hope for this keynote, and while it looks good, they still lack in a few areas FitBit has them smoked in:

1. Sleep tracking
2. Battery Life

I am really on the fence here. I love the products, hate the price, and feel like some basic features are missing when FitBit can deliver this stuff on a $150 device.
go make a phone call on your fitbit. then scroll thru some pix. watch a vid maybe. answer a text. get directions to a concert. oh wait.....

they are NOT the same device. you want a fitbit buy a f-ing fitbit. stop making annoying comparisons...
Score: 16 Votes (Like | Disagree)
SteveJobs2.0 Avatar
93 months ago
Apple Watch 4 saved this event.
Score: 13 Votes (Like | Disagree)
e-coli Avatar
93 months ago
I wish the stock Apple Watch faces didn't look like ridiculous toys. I had to buy an Hermès edition to get an attractive face. What's more, if I wanted the Nike watch faces, I'd have to buy a whole separate Apple Watch. It'd be great if Apple just opened a Watch Face section of the App Store. They'd sell like crazy.
Score: 10 Votes (Like | Disagree)
Lucamegh Avatar
93 months ago
2 hours event and that's the only product I'm (mildly) interested in. Thanks Tim!
Score: 7 Votes (Like | Disagree)
HiRez Avatar
93 months ago
Bigger screen is nice but that still looks like a real fat bezel to me. They may be "similar to the new iPhones" in terms of the actual width of the bezel, but as a percentage of screen size, they're much larger. It's a shame they couldn't bring it out closer to the edge and either make the screen even bigger, or make the case smaller.

I could also do with a slightly less bulbous curvature on the edges of the screen, make it a little flatter with a slightly sharper rounding, it kind of feels like I'm looking into one of those snow globes or something.
Score: 6 Votes (Like | Disagree)
Ankaa Avatar
93 months ago
Bummer, it's really not THAT much thinner. It appeared really thin on the pictures that leaked/during the presentation, but I'm not quite sure what difference 0.7mm make in reality, particularly on the smaller model. Add the additional 2mm in size and it might look even bulkier on small wrists (such as women's) than the previous series. Absolutely not thrilled about the larger size, my series 2 looks bulky on my wrist as is. Again, bummer, because I LOVE the new display and functionality.
Score: 4 Votes (Like | Disagree)