Which smartwatch is the more accurate fitness tracker, the Samsung Galaxy Watch 8 Classic or the Apple Watch Ultra 2? To find out, I wore the former on my left wrist and the latter on my right, before heading out on a 13-mile bike ride with 700-plus feet of elevation gain.
Of course, this is far from the first time I've tested one of the best Samsung smartwatches against one of the best Apple Watch models. A few weeks ago, I biked along a similar route with the Apple Watch 10 vs. Galaxy Watch 8 Classic. In that showdown, Samsung came out on top.
However, the Apple Watch Ultra 2 is a higher-end model than the Series 10. Will this make it more competitive against the lasted Galaxy Watch? There's only one way to find out!
Apple Watch Ultra 2 vs Samsung Galaxy Watch 8: quick comparison
But first, how do the Apple Watch Ultra 2 and Galaxy Watch 8 Classic stack up feature-wise and price-wise? The former debuted in 2023, almost two years ago, and costs $799. It represents Apple's top-of-the-line model with 100 meters of water resistance, a bigger battery, and more sophisticated location tracking than the Apple Watch Series 10.
The Galaxy Watch 8 Classic launched this summer, 2025. With a cost of $499, it's the priciest model in the Galaxy Watch 8 series, and the only model with a rotating bezel and programmable Action Button.
The Galaxy Watch 8 Classic sits below the more rugged Galaxy Watch Ultra, which is a more direct competitor to the Apple Watch Ultra 2. Notably, when I biked 13 miles with the Apple Watch Ultra 2 vs. Galaxy Watch Ultra, the results were a draw. Will that be the case this time around?
When it comes to onboard health and location tracking tech, the Apple Watch Ultra 2 and Galaxy Watch 8 Classic are very evenly matched. Each device has its respective brand's latest/greatest holistic sensor array, multi-band GPS, and altimeters for elevation tracking. Size and heft-wise, the devices are also quite similar.
The Apple Watch Ultra 2 and Samsung Galaxy Watch 8 Classic each wear fairly large on the wrist. The Apple Watch is taller, 49mm versus 46mm, and the Galaxy Watch is wider, 46mm versus 43mm.
They're similarly heavy, too. The Watch 8 Classic weighs in at 62.5 g (case only) and the Ultra 2 weighs in at 61.9 g (case only).
Even in the summertime, I tend to wear gloves while cycling, and this ride was no exception. Unfortunately, due to the size of these devices, this meant constant worrying about the glove material accidentally bumping a button, potentially messing up the results of the comparison. Fortunately, that didn't occur.
Displays on either watch max out at 3,000 nits, making them each easily viewable in direct sunlight, as was the case during this test. Battery life is also pretty similar. In our testing, the Ultra 2 cruised for 36 hours per charge, and the Galaxy Watch 8 Classic lasted for an average of 40 hours per charge.
With so much in common, you're no doubt wondering which one claims victory in this showdown of the Apple Watch Ultra 2 vs. Galaxy Watch 8 Classic. Read on to find out.
Apple Watch Ultra 2 vs Samsung Galaxy Watch 8: Bike test results
As always, for this bike test, I ran Strava on my iPhone 12 mini mounted to the handlebars of my bike. Neither watch was paired with a smartphone for the duration of the test to avoid any piggybacking off of location, elevation, speed or pace data.
| Header Cell - Column 0 | Apple Watch Ultra 2 | Samsung Galaxy Watch 8 | Strava |
|---|---|---|---|
Distance | 13.20 miles | 13.26 miles | 13.30 miles |
Elevation gain | 726 feet | 774 feet | 781 feet |
Average speed (moving) | 10.5 mph | 11.7 mph | 11.7 mph |
Max speed | 18.2 mph | 29.5 mph | 29.4 mph |
Average heart rate | 164 bpm | 165 bpm | n/a |
Max heart rate | 179 bpm | 182 bpm | n/a |
Calories burned | 762 calories | 748 calories | n/a |
Battery drain | 9% | 10% | n/a |
The best Apple Watch models seem to consistently churn out lower-than-expected speed data.
All three tracking methods measured just about the same distance covered, with the Galaxy Watch 8 ever so slightly closer to Strava's calculation. Samsung also measured just about the same amount of elevation gain for my roughly 75-minute ride. Apple, meanwhile, likely undercounted by 50-plus feet.
Both Strava and the Galaxy Watch 8 noted the same average moving speed of 11.7 mph and nearly the same maximum speed of around 29.5 mph.
Apple's average speed of 10.5 mph isn't too far off from the others, but Apple's max speed is considerably less. In fact, from my testing while biking, the best Apple Watch models seem to consistently churn out lower-than-expected speed data.
For example, when I tested the Apple Watch 10 vs. Garmin Forerunner 570, the former's speed data seemed to undersell my ride. The same occurred when I biked 12 miles with the Apple Watch 10 vs. Samsung Galaxy Watch 8.
That said, heart rate data and calories burned line up pretty nicely between the Apple Watch and the Samsung device. The Galaxy Watch 8 Classic noted a slightly harder workout, in terms of cardio, despite measuring slightly fewer calories burned.
To view my tracking results in real-time at a glance during the ride, I left the always-on display option on for both watches. The result was a similar level of battery drain.
Apple Watch Ultra 2 vs Samsung Galaxy Watch 8: And the winner is...
With more accurate distance, elevation, maximum, and average speed data, in this fitness tracking accuracy battle between the Samsung Galaxy Watch 8 Classic and Apple Watch Ultra 2, Samsung is the victor.
As always, take these results with a grain of salt, because ultimately, either device is a great choice to track your daily/weekly workouts and keep tabs on things like sleep quality, heart health, and more.
Which smartwatches or fitness trackers should I test next in a head-to-head competition? And what workout should I do? Let me know in the comments below.
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