Do you have to cancel your apps like on Iphone, if so how?

[AC Question]

cancel your apps

 

[B. Diddy]

Welcome to Android Central! You mean close them? No, unless an app appears to be misbehaving. See these articles for more info:

http://forums.androidcentral.com/ambassador-guides-tips-how-s/380592-guide-ram-android.html
RAM: What it is, how it's used, and why you shouldn't care | Android Central