Fitness Tracker for Cardio/Gym?

I've been trying to choose a fitness tracker that would help me count steps, but more importantly calories burned doing programs like P90, P90X, etc. I've read concerns about each of the different ones I like, so I'd love to hear if anyone has experience with these and if they will calculate calories for my exercise programs! Polar A360, Misfit Shine, Withings Steel, and Strive Fusion Bio. Thank you so much!!

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