ipad owner here -- you can use the 4 finger swipe for quickly switching apps. It's Apple's equivalent of a back button. It's also intuitive since you can see

ipad owner here -- you can use the 4 finger swipe for quickly switching apps. It's Apple's equivalent of a back button. It's also intuitive since you can see both apps as you are "dragging" the app back. You can also swipe up to get the equivalent of the double tap home button.