Skip to main content

Digital Trends may earn a commission when you buy through links on our site. Why trust us?

I went running with the Galaxy Watch Ultra and Apple Watch Ultra 2, and the results shocked me

Someone wearing the Samsung Galaxy Watch Ultra and Apple Watch Ultra 2 on the same wrist.
Joe Maring / Digital Trends

Two of the most ultra smartwatches available right now shouldn’t come as any surprise. The Apple Watch Ultra 2 is the biggest and baddest smartwatch for iPhone owners, while Android fans now have the Samsung Galaxy Watch Ultra. Ultras for everyone!

Although I don’t participate in ultra-level activities like mountain climbing or diving, I love running. It’s the type of exercise I enjoy the most, and as such, I need my smartwatch to be a suitable running companion.

For much of this year, the Apple Watch Ultra has been my go-to running watch, and I quite like it. How does the Galaxy Watch Ultra compare? I found out.

How I tested the watches

The Samsung Galaxy Watch Ultra and Apple Watch Ultra 2 sitting next to each other.
Joe Maring / Digital Trends

For this test, I kept things pretty simple. I put the Apple Watch Ultra 2 on my left wrist and the Samsung Galaxy Watch Ultra on my right wrist, and I set off on a 2-mile run.

The watches are both very similar in their run-tracking. Both track your distance, calories, heart rate zones, elevation, cadence, and more. Each watch also has a dual-frequency GPS for accurate location tracking. Furthermore, both watches also have a workout button (Action Button on the Apple Watch, Quick Button on the Galaxy Watch) that you can use to start, pause, resume, and mark segments during your run.

In summary, both watches should deliver pretty similar running experiences — at least on paper.

Galaxy Watch Ultra vs. Apple Watch Ultra 2: the results

The Samsung Galaxy Watch Ultra and Apple Watch Ultra 2 sitting next to each other.

Now that you’re caught up on the specs and features, what did the results look like? Here you go:

  Samsung Galaxy Watch Ultra Apple Watch Ultra 2
Duration 17:06 17:05
Distance 2.04 miles 2.01 miles
Active calories 199 calories 183 calories
Pace 08’20” per mile 08’28” per mile
Cadence 146 spm 144 spm
Heart rate 179 bpm 179 bpm
Elevation gain 50 ft 42 ft
Ground contact time 203 ms 284 ms
Vertical oscillation 10.6 cm 11.8 cm

What stands out to me the most is the average heart rate. Both smartwatches recorded an average heart rate of 179 bpm for the run, which is something I did not expect going into this test. I kept my eye on both watches throughout my run, and almost every time I checked, they were within 1-2 bpm of each other — if not returning the exact same reading. I generally consider the Apple Watch Ultra 2 to have one of the best heart rate sensors on a smartwatch, so this is really impressive accuracy on Samsung’s part.

I’m also impressed by the active calories and cadence numbers being so similar. There are expected variations for other metrics (namely, elevation gain, ground contact time, and vertical oscillation), but none of them appear to be worryingly different.

I was also pleasantly surprised by the Galaxy Watch Ultra’s GPS performance. The Galaxy Watch Ultra told me I completed my 2-mile run just a couple of seconds sooner than the Apple Watch Ultra 2 did. Given complaints people have had about previous Galaxy Watch GPS reliability, it’s nice to see the new dual-frequency GPS in the Galaxy Watch Ultra is doing its job.

Screenshot of advanced running metrics in the Samsung Health app.
Samsung Health advanced running metrics Digital Trends

The other thing I’d like to mention is how all of this data is presented. The Samsung Health and Apple Fitness apps are both excellent, and they both showcase your exercise data in a clean, organized manner. However, I think Samsung does a better job presenting some of the “nerdier” metrics.

After a run, you can tap Advanced running metrics to see a breakdown of your asymmetry, contact time, flight time, regularity, vertical oscillation, and stiffness. Each one is graded as either Great, Good, or Improve. For ones that need work, you can tap on a Drills button to see a handful of exercise routines that can improve that specific area. This isn’t new to the Galaxy Watch Ultra, but it’s a much better layout compared to Apple, which just shows graphs of this data without any explanation.

Which smartwatch should you run with?

Someone wearing the Samsung Galaxy Watch Ultra and Apple Watch Ultra 2 on the same wrist.

So, considering all of that, which smartwatch should you go running with? That’s ultimately decided by what kind of phone you have. If you’re an iPhone user, you can only use the Apple Watch. If you have an Android phone, your only choice is the Galaxy Watch. The Apple Watch Ultra 2 doesn’t work with Android phones, nor does the Galaxy Watch Ultra work with iPhones.

The big takeaway here is that, regardless of which Ultra smartwatch you end up choosing, you’re getting a pretty fantastic wearable. I’m thoroughly impressed by the Galaxy Watch Ultra’s performance in this test, and combined with some of the software advantages in the Samsung Health app, I’m seriously considering making it my go-to running smartwatch.

The Apple Watch Ultra 2 is still one of the best smartwatches you can buy, but if accurate and robust exercise tracking is high on your priority list, the Galaxy Watch Ultra isn’t far behind it.

Joe Maring
Joe Maring is the Section Editor for Digital Trends' Mobile team, leading the site's coverage for all things smartphones…
Samsung did the impossible with the Galaxy Watch Ultra
A person wearing the Samsung Galaxy Watch Ultra showing the Ultra Analogue watch face.

Samsung has done what I thought was impossible: It has made a watch face that I actually want to use all the time and don't intend to change.

Incredibly, after years of offering nothing but the same old thing, the Galaxy Watch Ultra has the smartest, most stylish, most useful, and most attractive watch face I’ve seen on a Samsung smartwatch. It’s called the Ultra Analog, and it’s fantastic.
Samsung and bad watch faces

Read more
The Samsung Galaxy S25 Ultra’s new display could look like this
The Samsung Galaxy S24 Ultra's screen, resting on a bench.

The Samsung Galaxy S25 rumor mill is already spinning fast enough to power San Francisco, but leaker Ice Universe has released even more information on the potential — and increasingly plausible — appearance of the new flagship phone. In a post on X (formerly Twitter), Ice Universe stated the new S25 Ultra would be only 77.6mm across compared to the 79mm width of the S24 Ultra.

Despite the reduction in overall size, the screen is actually larger thanks to smaller bezels. The new phone will reportedly add 0.07 inches to the diagonal screen size and 0.7mm to the width, even as the body frame shrinks.

Read more
The one Pixel Watch 3 feature I want the Apple Watch to copy ASAP
The Apple Watch Series 9's case back and sensors.

It’s a hot Google summer, as the company recently announced its newest lineup of Pixel devices, with the biggest stars being the new Pixel 9 lineup and the Pixel Watch 3. Though the Pixel 9 phones got a big redesign, the Pixel Watch 3 looks mostly the same, though it now comes in two sizes.

But Google made the Pixel Watch 3 stand out more than expected with a new feature that hasn’t been on any wearable until now: Loss of Pulse Detection.

Read more