strenos
Partly. Apple's Workout app has two strength workouts, Traditional Strength Training and Functional Strength Training. It records how long you trained, your heart rate and an estimate of the calories you burned, and since watchOS 11 you can rate how hard the session was from 1 to 10. It doesn't log your sets, reps or the weight on the bar. For that you need a lifting app with a watch app.
What the Workout app records
Open the Workout app and you'll find both strength options on Apple's list of workout types. Apple's advice is to pick the one that best matches what you're doing. Its support pages don't spell out the difference, but for a barbell session, Traditional Strength Training is the closest match by name.
While you lift, the watch shows elapsed time, calories and heart rate. When you end the workout, it shows up in the Fitness app on your iPhone under Sessions.
Three newer features matter for lifters:
- Effort rating. Since watchOS 11, every workout can get an effort score from 1 to 10. Cardio workouts get an automatic estimate based on your heart rate and other data. Strength training doesn't, so you rate the session yourself when you finish.
- Training load. The Activity app compares your last 7 days of training with your previous 28 days, using effort ratings and duration, and places you on a scale from well below to well above. For lifting, that comparison leans on the effort ratings you enter yourself.
- Workout Buddy. Since watchOS 26, the watch can talk you through a workout, and Traditional and Functional Strength Training are on the list. You need Bluetooth headphones and an iPhone that supports Apple Intelligence nearby. It launched in English.
What it doesn't record
Apple's guide to the Workout app doesn't mention sets, reps or weight anywhere. So after a session, the watch knows you trained for an hour at a certain average heart rate. It has no idea that you squatted 315 for 5 sets of 5, or that the last set was a grinder.
That's the gap that matters for strength. Your progress lives in the numbers on the bar: the weight, the reps and how many reps you had left. Heart rate and calories can't tell you whether you got stronger this month.
Don't put much weight on the calorie number either. In a 2026 study, 70 men did bench presses, T-bar rows, squats and deadlifts wearing four smartwatches, Apple Watch Series 8 among them. Calorie estimates from all four agreed poorly with lab measurements. A second 2026 study reached the same conclusion for resistance exercise.
The short answerApple Watch records how hard you worked, not what you lifted. Heart rate holds up, calories are a rough guess, and sets, reps and weight need a lifting app.
How to get useful heart rate data while lifting
Heart rate holds up much better than calories. In that same 2026 study, Apple Watch was off by less than 2 beats per minute on average compared with an ECG. Readings were least accurate right after each set, mostly on the Samsung and Fitbit watches. Another study, by Støve and Hansen in the Journal of Sports Sciences, found that Apple Watch Series 6 closely matched a Polar H10 chest strap on squats, deadlifts and seated cable rows. It matched less well on dumbbell curl to press and burpees.
Apple's own tips help:
- Wear it snug, on top of your wrist. Apple suggests tightening the band for a workout and loosening it when you're done.
- Pick the matching workout type. Choose a strength option instead of Other.
- Expect weaker readings on jerky moves. Apple says rhythmic movements like running or cycling give better results than irregular ones like tennis or boxing.
- Watch for tattoos and cold. Some tattoo ink blocks the sensor, and cold can cut blood flow in your wrist too low for a reading.
- Pair a chest strap if you need precision. Apple Watch can connect to Bluetooth chest straps.
Keep in mind what heart rate can and can't tell you. It's useful for circuits and conditioning finishers. On a heavy triple, what matters is how many reps you had left, and no watch measures that. Rate the set with RPE instead. The RPE chart shows what each number means.
What a lifting app adds
A lifting app with a watch app fills the gap. You see the exercise and the weight on your wrist, check off the set, enter your reps and run the rest timer. Here's what some popular ones say about their watch apps, as of November 8, 2026:
| App | What its watch app does |
|---|---|
| Hevy | Logs sets, starts rest timers and finishes the workout without touching your phone. Saves when the watch reconnects to the phone |
| Strong | Starts a routine or an empty workout on the watch, changes weight and reps with the Digital Crown, runs a rest timer, logs RPE and shows heart rate and calories. Works with or without the iPhone |
| Liftosaur | Shows which plates to load and works with the phone in your locker. The watch app needs Premium |
| Boostcamp | No Apple Watch app yet, according to Boostcamp itself |
Before you pick one, check a few things. Can you start a workout on the watch, or only on the phone? Does it work when the phone isn't nearby? Does it only record what you lifted, or does it work out the next weight from your program? Is the watch app free? If you run 5/3/1, nSuns or GZCLP, see which iPhone apps work out your weights for you. If you're just starting to log, read how to keep a workout log.
How Strenos works on Apple Watch
You start the workout on your iPhone. The watch can't start one on its own. From there, you run it from your wrist: check off sets, rate each one with RPE or effort, skip or add rest and keep an eye on your heart rate. After a plus set, the watch asks how many reps you got, and you set the number with the Digital Crown. The rest timer also shows up on your lock screen and in the Dynamic Island as a Live Activity.
When you run a program, the weight on the watch comes from it. Strenos runs 5/3/1, nSuns, GZCLP, the Texas Method and Smolov Jr and rounds the weights to the plates in your gym. When you finish, the workout goes to Apple Health as Traditional Strength Training, with your heart rate and calories.
The strength log and the watch app are free for good. Your data stays on your iPhone and in your own iCloud, with no account to create.
If you want to leave your phone in a locker and start everything from your wrist, Strenos isn't built for that. Hevy, Strong and Liftosaur say their watch apps can run a workout without the phone.
