I tested the Fitbit Air vs Apple Watch SE 3

Close-up of the Apple Watch SE 3 and Fitbit Air in a user's hand against a bright, colorful background — (Image credit: Dan Bracaglia/Tom's Guide)

I tested the fitness tracking performance of the Apple Watch SE 3 vs the Fitbit Air while walking exactly 4,500 steps, and I'm surprised by the winner.

The Apple Watch SE 3 is Cupertino's latest entry-level, full-featured smartwatch and one of the best cheap smartwatches of 2026. The Fitbit Air, meanwhile, is a brand-new, diminutive, screen-free wearable and one of the best fitness trackers available right now.

Both devices track tons of workout types and deliver similarly detailed post-effort insights, but which one is more reliable? To find out, I walked 4,5000 steps while wearing the Apple Watch SE 3 on my left wrist and the Fitbit Air on my right. As a primary control for tracking accuracy, I manually counted my steps, noting every hundred taken with a click of my trusty tally counter.

I also logged my efforts using the Strava app on my iPhone 16 Plus as a control for distance, pace, and climb data. So, which wearable came out on top, the Fitbit Air or the Apple Watch SE 3? Read on.

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Fitbit Air vs Apple Watch SE 3: fitness tracking accuracy compared

Close-up of the Apple Watch SE 3 and Fitbit Air in a user's hand against a colorful, vibrant background — (Image credit: Dan Bracaglia/Tom's Guide)

Before jumping into the results, it's worth noting some of the primary differences between these two popular wearables. For starters, the screen-less Fitbit Air is designed to be a distraction-free tracker with no notifications or smart features (except just one).

On the other hand, the Apple Watch SE 3 is essentially the opposite: an ultra-connected smartwatch that does much more, in terms of smart features, than just track health and fitness stats. The SE 3 is also considerably pricier than the Air, starting at $249 compared to $99 for the latest Fitbit.

Finally, the Apple Watch SE 3 sports onboard GPS for location tracking without a paired smartphone; the Fitbit Air does not. That said, when you do carry your smartphone while logging an outdoor workout with the Air, fitness tracking performance is excellent.

Now, on to the test results!

Fitbit Air vs Apple Watch SE 3: Walk test results

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3,000-step walk comparison: Fitbit vs Apple vs Strava
Header Cell - Column 0	Fitbit Air	Apple Watch SE 3	Control
Steps	4,488 steps	4,463 steps	4,500 steps (manual count)
Distance	2.41 miles	2.37 miles	2.40 miles (Strava)
Climb	199 feet	289 feet	277 feet (Strava)
Average pace (elapsed)	17 mins 24 secs	17 mins 07 secs	16 mins 50 secs (Strava)
Average heart rate	122 bpm	135 bpm	n/a
Max heart rate	160 bpm	167 bpm	n/a

I logged exactly 4,500 steps (manual count) during my roughly 40-minute walk around a gloomy Seattle, Washington, including a climb up the city's steepest hill. And much to my delight, both wearables logged similar step counts that fall well within a reasonable margin of error; ultimately, any tally within 100 steps of my actual count is considered an impressive outcome.

However, while the Apple Watch SE 3 is just 37 steps of my actual total, the Fitbit Air is off by just 12 steps. Strava, meanwhile, bested them both, logging 4,502 steps.

Distance data is similarly enough across the board, with Fitbit Air proving slightly more in line with the control data. However, the Air's climb data leaves a lot to be desired. The SE 3, in contrast, noted just a bit more uphill effort than Strava.

Thanks to the gloom, I encountered little traffic, which meant that I didn't stop moving at any point during this walk. As a result, I expected my average pace to be pretty similar across the board, which it is. However, Apple's pace calculation is closer to the control than Fitbit's.

Similar to my prior walk test with the Fitbit Air vs Garmin Forerunner 70, the former's heart rate data is noticeably lower than the competition's. This is a somewhat odd result, given that the Fitbit Air's heart rate tracking performed admirably time and again during testing for the review, regardless of which wrist I wore it on.

One possible theory for the discrepancies: I didn't wear the Air tightly enough during my last two walk tests.

Fitbit Air vs Apple Watch SE 3: Winner

Close-up of the Fitbit Air on-wrist on a red strap against a blue background — (Image credit: Dan Bracaglia/Tom's Guide)

Despite the Apple Watch SE 3 costing 2.5x the Fitbit Air, Google's humble, screen-less fitness tracker wins this showdown. However, the SE 3 performed nearly as well when it comes to step count and was more accurate across the board for other key metrics.

Which fitness trackers, smartwatches, smart rings, etc. would you like me to test head-to-head next? Let me know in the comments below.

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Dan Bracaglia is the Tom’s Guide editorial lead for all things smartwatches, fitness trackers and outdoor gear. With 15 years of experience as a consumer technology journalist testing everything from Oura Rings to instant cameras, Dan is deeply passionate about helping readers save money and make informed purchasing decisions. In the past year alone, Dan has assessed major product releases from the likes of Apple, Garmin, Google, Samsung, Polar and many others.

An avid outdoor adventurer, Dan is based in the U.S. Pacific Northwest where he takes advantage of the beautiful surroundings every chance he gets. A lover of kayaking, hiking, swimming, biking, snowboarding and exploring, he also makes every effort to combine his day job with his passions. When not assessing the sleep tracking and heart rate accuracy of the latest tach gadgets, you can find him photographing Seattle’s vibrant underground music community.