Apple watch

Yes, but be aware of a bug with step counts. If you only do steps and not intentional exercise sync'd over, you will see it behave as designed, giving you more calories for more steps. However, once you log a workout on your watch and it syncs over, your step count is tracked, but you get no extra calories from steps.

For instance, say I walk 5000 steps early in my day and it gives me an extra 100-200 calories for that. At lunch, I do a workout through the workout app on my watch and burn 250 calories. That should make MFP see it as if I earned 350-450 exercise calories back. But it only shows the 250 for the workout and I no longer earn any more step calories either.

You can compensate for that by adjusting your activity level if your days are pretty consistent or logging a generic walk exercise to make up for it if your days are variable. I personally track outside of MFP because of it and only use the app for tracking my food intake. I go by the sum of my active and resting calories in Apple Health minus the total calories I've eaten in MFP to figure out my daily deficit.