This is a brief summary of some of the differences between the Apple and Google smartphone interfaces. People get used to operating a device and tend to upgrade to a new model on the same platform. Another reason not to switch is the inconvenience of swapping contacts, photos, music, videos and apps, which in the latter case may mean buying the software again. For everyday use, both platforms are relatively straightforward. Tapping an icon to launch an app, pinching and expanding to resize images and turning the unit on and off are the same. Although both devices can be configured to do similar things, the settings menus are very different. Like Mac and Windows As it does with the Mac, Apple controls the hardware and iOS mobile operating system. Like Microsoft, Google only controls the Android OS with one exception (see Google Nexus and Pixel C). All iPhone OS versions have the same interface, whereas Android phone vendors can add their own set of apps and different interface features. See app launcher. There are only a few current iPhone models, while dozens of current Android models are available. iPhone users tend to upgrade to the latest iOS release within a short time, whereas Android OS updates are distributed by the phone manufacturer if there is an upgrade at all, resulting in hundreds of hardware/OS combinations in use. This may not affect the average user, but it drives Android software developers to distraction when testing new apps. iPhone Advantages iPhones are generally easier to use, because the user interface is more consistent, although iOS 7 was a big change in 2013. Apple does a more thorough job of testing the apps deployed in the iTunes app store. Apple also rejects software it deems objectionable, including X-rated apps. However, nothing stops a user from retrieving available content on the Web via the phone's Web browser. See iPhone. Android Advantages Users love the Android's dedicated and always-available Back button. No matter which app is running, pressing Back on an Android device takes the user back one step. There is no such dedicated button on the iPhone or iPad. Each app must be designed with its own Back icon on each screen. Android phones have an app drawer, which lists all apps alphabetically. Users can drag icons from the app drawer to customize their home screens however they wish, but the app drawer is always available as a separate entity. Android users can also download apps from numerous online stores rather than only one. See online app store and Android.