Watch the Apple Watch Series 4 Smoke Older Apple Watches in Speed Comparison

The Apple Watch Series 4, launched last week, features a new dual-core S4 chip that's significantly faster than the S3 chip in the Series 3, and, of course, the chips used in older Apple Watch models.

We did a side-by-side comparison of the Apple Watch Series 4 to the original Apple Watch, the Series 1 models, the Series 2 models, and the Apple Watch Series 3 to see how far the Apple Watch has come since it was first introduced in 2015.


According to Apple, the fourth-generation dual-core 64-bit Silicon-in-Package or SIP chip in the Apple Watch is twice as fast as the previous-generation S3 chip. Its improved efficiency and speed allow for better battery conservation and new health-related features like ECG readings.

In our testing, we compared Apple Watch tasks like booting up, opening apps, and activating Siri to demonstrate the speed differences between each generation.

Unsurprisingly, the Series 4 was the fastest, but for a lot of tasks, there weren't huge speed differences between the Series 4 and the Series 3.

When comparing the Series 4 to the Series 2 and older, though, you can see the impressive improvements Apple has made to the processor over the course of the last three years. While it took the Apple Watch Series 4 40 seconds to boot up, it took the Series 2 almost four minutes, the Series 1 three minutes, and the Series 0 five minutes.

When opening up apps, we didn't see a huge difference between the Series 3 and Series 4 for most tests, but the Series 4 was always just a little bit faster. On Series 2 and older, apps took a good deal longer to open, and in some cases, like with the original Apple Watch, apps took so long we gave up.

So, what can we learn from this? You may not see major speed changes when upgrading to Series 4 from Series 3, though everything will feel snappier.

You will, however, notice an incredible difference upgrading from an original Apple Watch, Series 1 model, or Series 2 model, which makes upgrading from one of these older devices worthwhile.

In our opinion, if you're considering upgrading from a Series 2 or earlier to the Series 4, do it. The speed changes are so drastic that using the Apple Watch Series 4 is an entirely different experience than using an older Apple Watch.

Have you upgraded to a Series 4 from an older Apple Watch model? Let us know what you think about the new device in the comments below.

Related Roundup: Apple Watch 10
Buyer's Guide: Apple Watch (Neutral)

Popular Stories

iOS 19 Mock WWDC25 Feature

iOS 19 Expected to Run on These iPhones

Monday March 31, 2025 5:28 pm PDT by
iOS 19 will not be available on the iPhone XR, iPhone XS, or the iPhone XS Max, according a private account on social media site X that has accurately provided information on device compatibility in the past. The iPhone XR, iPhone XS, and iPhone XS Max all have an A12 Bionic chip, so it looks like iOS 19 will discontinue support for that chip. All other iPhones that run iOS 18 are expected...
maxresdefault

Apple Releases iOS 18.4 With Priority Notifications, Ambient Music, New Emoji and More

Monday March 31, 2025 10:03 am PDT by
Apple today released iOS 18.4 and iPadOS 18.4, the fourth major updates to the iOS 18 and iPadOS 18 operating system updates that came out last year. iOS 18.4 and iPadOS 18.4 come two months after Apple released iOS 18.3 and iPadOS 18.3. Subscribe to the MacRumors YouTube channel for more videos. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to...
iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2 and AirPods 4

Monday March 31, 2025 11:27 am PDT by
Apple today released new firmware updates for all AirPods 4 and AirPods Pro 2 models. The new firmware is version 7E93, up from the 7B21 firmware that was installed on the AirPods Pro 2 and the 7B20 firmware available on the AirPods 4 and AirPods 4 with ANC. It is not immediately clear what new features or changes are included in the new firmware, but we'll update this article should we find ...
watchOS 11 Thumb 2 1

Apple Releases watchOS 11.4 With Sleep Alarm Update

Tuesday April 1, 2025 10:34 am PDT by
Apple today released watchOS 11.4, the fourth major update to the operating system that runs on the Apple Watch. watchOS 11.4 is compatible with the Apple Watch Series 6 and later, all Apple Watch Ultra models, and the Apple Watch SE 2. watchOS 11.4 can be downloaded on a connected iPhone by opening up the Apple Watch app and going to General > Software Update. To install the new software,...
macOS Sequoia Feature

Apple Releases macOS Sequoia 15.4 With Mail Categorization and More

Monday March 31, 2025 10:04 am PDT by
Apple today released macOS Sequoia 15.4, the fourth major update to the macOS Sequoia operating system that launched in September. macOS Sequoia 15.4 comes two months after the launch of macOS Sequoia 15.3. Mac users can download the ‌‌macOS Sequoia‌‌ update through the Software Update section of System Settings. It is available for free on all Macs able to run macOS 15. With...
top stories 2025 03 29

Top Stories: WWDC 2025 Announced, iPhone 17 Pro and iOS 19 Rumors, and More

Saturday March 29, 2025 6:00 am PDT by
Apple's big developer event is a little over two months away, and rumors about what we can expect to see in Apple's next major operating system updates are becoming increasingly frequent. A public release of iOS 18.4 is also imminent with a number of updates and improvements, although we won't be getting the major Apple Intelligence Siri upgrades that had reportedly been planned for this...
iOS 19 visionOS UI Elements

Apple Codename Provides Clue About iOS 19's Rumored New Design

Sunday March 30, 2025 6:40 am PDT by
Multiple sources have claimed that iOS 19 will introduce a new design with more translucent buttons, menus, notification banners, and more, and there is now another clue that points towards this glass-like appearance. Bloomberg's Mark Gurman today said the new design project is codenamed "Solarium" internally. A solarium is a room with glass walls that allow in plenty of sunlight, so this...

Top Rated Comments

Wombat-man Avatar
85 months ago
Surely it's not good for a watch to be "fast"...?:)
Score: 47 Votes (Like | Disagree)
Baymowe335 Avatar
85 months ago
The Watch 4 is the first watch that really makes a statement for looks and utility of a smartwatch.

The processing has finally gotten good enough to make this compelling enough to replace your iPhone some of the time.
Score: 18 Votes (Like | Disagree)
m4mario Avatar
85 months ago
Next Apple watch feature: Smoke detection when it smokes other smart watches.
Score: 15 Votes (Like | Disagree)
jclo Avatar
85 months ago
I find it funny when people act surprised that the Series 1 and Series 2 perform similarly (with the Series 1 beating the Series 2 in certain cases). They are the same chip minus the GPS on the Series 1 (and I suspect that mostly explains why the Series 1 bests the Series 2 on the bootup test as it has less things to load).

As an aside it looks like I'm going to have to go back to wanting to upgrade to a Series 4 just for the bigger screen and thinner profile as it doesn't look the speed difference compared to my Series 3 will be that noticeable in everyday use (except maybe with 3rd party apps, but I rarely use any). Oh well...
Coming from Series 3, I feel like the Series 4 is just overall speedier and a much more pleasing experience even though the differences look minimal in the video. A second here or there really adds up.
Score: 11 Votes (Like | Disagree)
djlythium Avatar
85 months ago
Yea, just upgraded from a Series 1, and, damn...
Score: 11 Votes (Like | Disagree)
ThomasJL Avatar
85 months ago
This highlights the stupidity of the first real gold Apple Watch Edition that started at $10,000 and went up to $17,000. How stupid does one have to be to spend so much money on something that will be outperformed by the cheapest Apple Watch the very next year, and massively outperformed by the cheapest Apple Watch a few years after that?
Score: 10 Votes (Like | Disagree)