Apple Watch Calories Off
My total calories burned for an indoor cycle are always like anywhere from 20-100 calories less on my Apple Watch workout app than on my iFit app workout on my ProForm studio bike.
Apple Watch Series 7, watchOS 9
How do you know which one s more accurate?
See the "Make sure that you earn Move and Exercise credit" section in:
Get the most accurate measurements using your Apple Watch - Apple Support
You should also make sure your watch is calibrated:
Calibrating your Apple Watch for improved Workout and Activity accuracy - Apple Support