not if you set up your account properly. what spark does is it takes the number of calories you say you burn a week [your calories burned goal on your start page], divides it by seven and adds that number to your bmr and daily activities before it subtracts out your deficit. so if you accurately told the program what you burn a week, then those calories are already accounted for. if you did not accurately enter your calories burned then it would be easier for you to keep that info accurate so that the program can just do all the math for you.
-google first. ask questions later.