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                  App Development





                     What is an App?
           Prime (Ver. 2.2)-VIII  An app is a software program primarily developed for hand-held smart devices such as mobile and


                  tablet. It helps the user to perform their personal and professional tasks more effectively. The
                  app is a modern term derived from the word application. Generally, the word app is used to refer
                  the applications on smart devices such as mobiles and tablets. Thousands of apps are available for
                  smart devices. Most of the apps are freely downloadable from app store. However, some of the
                  apps need to purchase from the app store.

                  The three most popular app stores are Google’s Play Store, Apple’s App Store, and Microsoft
                  Store. However, the Windows Store is not in use for mobile devices. But can download the apps for
          150     your computer from the Windows Store.

                  There are mainly three types of applications:

                  •   Desktop: The application that is mainly developed for computer or laptop is called a desktop
                     application. This type of application depends of the hardware and operating system on which it
                     run. It is usually developed for a particular operating system. Some of the examples of desktop
                     applications are Paint, Notepad, and Word.
                  •   Mobile: Mobile application (also known as mobile app) is software program that is developed
                     for hand-held devices such as smartphones and tablets. These apps are installed and run on the
                     device itself. Some of the examples of mobile apps are Snapchat, WhatsApp, and Facebook
                     Messenger.
                  •   Web: A Web  app is an application program that is stored on a remote server and accessed
                     over the Internet through a Web browser interface. Some of the mobile apps and Web apps
                     look and work in same way, with very little difference between them. However, these two are
                     very different from each other. One of the major differences is that the Web apps require an
                     Internet connection to work.


                     Defining the Android and iOS


                  Nowadays, most of the mobile devices run on Android and iOS.

                    Android

                  Android is an operating system for mobile devices developed by Google. It is
                  the most commonly used operating system in mobile devices. Google and some
                  other mobile manufacturing companies use the Android as operating system
                  for their devices. Android provides an easy to use and friendly environment to
                  their users. The user interface of an Android mobile looks like this:
                                                                                                         Android
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