To do multitasking in Android and iPhone it requires a lot of understanding of both the hardware and software. It is a new concept for these devices, though some users find it difficult to get used to it. To multitask, the OS should carefully manage how programs and instructions are processed in the central processing unit, and how all their data is held in the main memory. There is multitasking on Android and iPhone, but it does not work the same way like on actual computers.
To multitask in Android and iPhone, the user has to launch one program or an app, then switch to the other one. But because multitasking in these two devices runs in separate processors, there is a performance difference between them. In Android, apps can be launched in different ways, such as by tapping on the icons or pressing on the menu. On the iPhone, launching an app is done by sliding a finger across the home screen. Because of this difference in performance, multitasking in Android and iPhone needs to be learned and practiced more carefully.
One aspect of multitasking in Android and iPhone is that the operating system does not switch the apps running in the foreground automatically when the device isn't performing any task. The apps running in the background can, however, be minimized and opened by pressing the home button twice. This transition is smooth, as long as the apps are downloaded and saved properly. However, if you are using a lot of apps, the multitasking behavior in Android and iPhone may cause lag, especially when the apps are running in the background.