yep that is true. that's why iOS attempt on multitasking is a failure because when it switches between apps it just freezes the app. I believe android leaves the app running when you switch or run another app. unless you manually kill it or automatically gets killed by the system due to insufficient memory it will continue to run in the background. That is why many android users uses task killer apps because its to bothersome to kill running apps in android 2.3 and below.