Back in older days of the earlier iPhones and firmware for these Apple handsets users had to click twice their Home button to switch between applications, copy things from one browser to the Mail program and do other things with the smartphone. The operating system released in 2013 is like the cosmetic surgery but for the software and Apple users. It makes iOS 7 switch between apps more intuitive and simple.
iOS 7 iPhone Control Center and better multitasking. Once you double-click on Home button you will see a list of icons that represent all your open programs. The pics will display what each app is about. There is no need to switch into the application if you just wanted to make sure everything is going on the way you wanted in it and this information can be obtained from the shrunken-down image of the program’s screen.