 The app switcher in the iPad can also be accessed by swiping up from the bottom.In the iPhone, the app switcher cannot be accessed if there are no apps in the RAM.In iOS 4.0 to iOS 6.x, briefly holding the icons in the application switcher makes them "jiggle" (similarly to the homescreen) and allows the user to "force" quit the applications by tapping the red minus circle that appears at the corner of the app's icon.