Sports workout- My friends 2 year old smartwatch records 1000 calories burned for him, only showed roughly 200 for me on Shealth and roughly 50 on Nikerunning on another day of same workout. There were other inaccuracies across the board in terms of distance/speed/etc. I mean activity tracking has to be one of the top reasons for a lot of purchases, why is it so bad? Is there another exercise app that's accurate?