Can a Smartwatch Count Your Reps? Apple Watch vs Garmin vs Fitbit vs Whoop (2026)

Some smartwatches can count your reps automatically, but most can't, and the ones that try are inconsistent. In 2026, only Garmin and Samsung do motion-based auto rep counting natively, the Apple Watch needs a third-party app, and WHOOP, Fitbit and Oura don't count reps at all. So can a smartwatch count reps? Yes, with big asterisks. Here is the honest device-by-device breakdown.

I've trained for 15 years and tested most of these on a real gym floor, not in a lab. Below is the verdict table first, then the why behind each one.

The verdict table: which watches actually count reps

That table is the whole answer if you're skimming. The rest of this page earns the detail.

Can a smartwatch count reps?

Yes, but "count reps" means two very different things. There are auto-detected reps, where the watch senses each rep from your wrist motion, and logged reps, where you type the number in yourself. Most fitness tracking dressed up as rep counting is the second kind. Only Garmin, Samsung and a handful of Apple Watch apps attempt true motion-based detection from the watch's accelerometer and gyroscope.

Every one of these systems infers reps from the same hardware: an accelerometer and a gyroscope on your wrist. That sensor reality is why accuracy is so uneven, and it's the thread running through this entire comparison. A curl swings the wrist through a big, clean arc; a leg press barely moves it. The same watch can be near-perfect on one and blind on the other.

A quick test before you trust any counter: do one set of curls and one set of leg extensions, and compare the number on the screen to the number in your head. If the second one is wrong, that's the device's blind spot, not a setting you can fix.

Can the Apple Watch count reps?

No. The Apple Watch has never counted reps natively, and that's still true in 2026. If you pick "Traditional Strength Training" or "Functional Strength Training" in the built-in Workout app, it logs heart rate, duration and active calories, not reps, not sets, not which exercise you did (MyHealthyApple).

To get auto rep counting on an Apple Watch, you install a third-party app. Motra (formerly Train Fitness), Gymatic, Rep Up and Fitnexx all read the Watch's motion sensors to count reps for you. The difference between them is what they do beyond counting, and my full review of Apple Watch strength apps ranks them.

Riven is the Apple Watch app that scores muscle failure. It reads your wrist motion and stays quiet during the set; about three seconds after you rack the weight you get the exercise, the rep count and a 0-100 score. Reps slow down as a muscle nears failure, and that is what the score is built on. No barbell clip, no camera, no extra hardware. It shows you which set was the real one.

Here is the practical upshot: if you already own an Apple Watch, the cheapest path to auto rep counting is an app, not a new device. Expect to confirm or correct a set occasionally. Machine holds and low-wrist-movement isolation moves are the hard case for every wrist counter and may need manual entry; nothing on the market auto-counts those cleanly. That's the honest state of the art.

Does Garmin count reps?

Yes. Garmin is the one major brand with native automatic rep counting, built into the "Strength" activity on watches like the Forerunner 165, vivoactive 5, Venu and fenix. It uses the wrist IMU to detect when your arm returns to its start position (Garmin Support).

Native does not mean accurate. Garmin's counter works best on consistent-arm-motion lifts, such as bicep curls and overhead press, and frequently miscounts or fails on push-ups, leg press, leg extension, leg curl, low-range moves and machine work. Garmin's own support docs tell you to manually edit reps after a set (Garmin Support). Plenty of lifters I know just turn auto-count off and set a rep target instead, which turns the watch into a timer with a tally you fill in yourself.

If you own a Garmin and mostly lift free weights through a full range of motion, the counter is usable. If your training is machine-heavy or leg-heavy, budget for editing every set.

Does Samsung Galaxy Watch count reps?

Yes, on free weights. The Galaxy Watch auto-counts sets and reps for dumbbell and barbell exercises, which makes it the closest native competitor to Garmin. But Samsung explicitly can't count machines, leg extensions, leg presses, leg curls, push-ups or jump rope (MyHealthyApple).

In practice that splits a typical session down the middle. Dumbbell press, curls and rows get counted; the leg half of the workout and most of the machine work do not. Samsung is cleaner than Garmin on the lifts it supports and blind on the ones it doesn't, so which is "better" depends entirely on what your program looks like.

Does Fitbit count reps?

Effectively no. Fitbit and Pixel Watch don't do reliable motion-based rep counting. Strength training gets logged as a generic "Weights" workout, and rep and set entry is manual: you type the numbers in afterwards. That makes a Fitbit a logbook you wear on your wrist, not a rep counter. If you want the watch itself to sense reps, Fitbit is the wrong platform.

Does WHOOP count reps?

No. WHOOP doesn't count reps at all. Its Strength Trainer estimates muscular load from accelerometer and gyroscope data while you set up the exercises yourself, and the band is screenless anyway (WHOOP). You tell it what you are about to lift; it tells you how much strain the session added. WHOOP is a recovery and strain device, which is a different job. For the full head-to-head, see Apple Watch vs WHOOP for lifting.

Does Oura count reps?

No. A ring can't count reps or identify lifts. With a membership it can auto-detect that a strength session happened (roughly 10+ minutes of movement) and log duration and heart rate, but a finger-worn sensor struggles with isometrics, slow eccentrics and low-hand-movement sets (Vertu). Like WHOOP, Oura is built for sleep and readiness, not for what happened inside a set.

Which smartwatch is best for counting reps? (comparison table)

For pure native rep counting, Garmin and Samsung lead: Garmin across more exercise types, Samsung cleaner on free weights but useless on legs and machines. For Apple Watch owners, a dedicated app beats buying new hardware.

Why the wrist is genuinely hard

This isn't a software bug you can patch away; it's signal physics. A wrist sensor has to infer a rep from acceleration and rotation that vary wildly by exercise, grip and wrist angle. A systematic review of IMUs for barbell velocity found them generally less valid and less reliable than linear position transducers like GymAware and motion capture, with accuracy heavily dependent on the movement and hardware (PMC review). Your wrist rotates and translates differently from the bar, so raw wrist velocity isn't bar velocity. That's why machines, cables and leg work are everyone's blind spot.

Counting reps is the floor; effort is the ceiling

Here is the thing the spec sheets miss: the rep tally isn't even the most useful number. What drives muscle growth is proximity to failure, and velocity loss within a set is a validated proxy for it. A 2023 Sports Medicine - Open study (Refalo et al., bench press at 75% 1RM) found velocity loss scaled cleanly with effort: about -22% first-to-last set when training to failure, versus -9% at 1 rep-in-reserve and -6% at 3 RIR (Refalo 2023). VBT coaches use ~40% velocity loss as the lower-body failure threshold and ~50% for upper body (VBT Coach).

A device that counts reps tells you how many. A device that reads how much your reps slowed tells you how hard: which set was a grinder and which was a warm-up. None of the native counters above attempt that. The Apple Watch can read that slowdown with the right app, and it's the number worth caring about once the counting is handled.

FAQ

Can a smartwatch count reps automatically?

Some can. Garmin and Samsung count reps natively from wrist motion; the Apple Watch needs a third-party app. WHOOP and Oura don't count reps at all; they track strain and recovery.

Can the Apple Watch count reps without an app?

No. The built-in Workout app's strength modes only log heart rate, duration and calories. Automatic rep counting on Apple Watch always requires a third-party app.

Is Garmin's rep counting accurate?

It's inconsistent. It works reasonably on curls and presses but miscounts leg exercises, push-ups, low-range moves and machine work; Garmin's own docs tell you to edit reps manually after a set.

Does Samsung Galaxy Watch count reps on machines?

No. Samsung auto-counts dumbbell and barbell exercises but explicitly excludes machines, leg presses, leg extensions, leg curls, push-ups and jump rope.

Do WHOOP or Oura count reps?

No. WHOOP estimates muscular load from motion while you set up the exercises; Oura can detect that a strength session happened but can't identify lifts or count reps from a finger.

What's the most accurate way to count reps from a wrist?

A dedicated, exercise-aware app beats a generic motion trigger. Riven is the Apple Watch app that scores muscle failure; it counts within about a rep on the large majority of sets and scores each set the moment you rack it. Machines and low-motion isolation moves remain the hard cases for every system.

Sources

• MyHealthyApple — Strength Training Using Apple Watch
• Garmin Support — How Rep Counting Works and Editing Reps Manually
• MyHealthyApple — Weightlifting with the Samsung Galaxy Watch
• WHOOP — Introducing Strength Trainer
• Vertu — Testing the Oura Ring's Workout Tracking Accuracy
• Validity and Reliability of IMUs for Barbell Velocity (PMC systematic review)
• Refalo et al. 2023, Sports Medicine - Open — Proximity-to-Failure and Neuromuscular Fatigue
• VBT Coach — Velocity Loss Thresholds for Fatigue