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    Step 3:   Tap on the app you want to install. In our case, we have tapped the Grammar EN app. The
                             App info screen appears.
                     Step 4:   Tap on the Install button. The downloading of the app will start. When the downloading is
                             completed, the installation process will start automatically. Within few seconds, your app will
                             be installed on your mobile and the Uninstall and Open buttons will appear on the Google’s
                             Play Store home screen.
                     Step 5:   Tap on the Open button to use the app. In case you want to uninstall the app, then tap on the
                             Uninstall button.

                                                                Installing an app

                                                                 Tech Hint
                                To uninstall an app from your Android mobile: Settings → Apps Management

                            DEVELOPING AN APP

                     There are many open source app development software available. They help us to develop an app.
                     While developing an app we should keep some points in mind:
                        The idea of developing an app should be unique.
                        The app we are going to develop should contain all the relevant features.

                        The app should be user friendly.
                     Let us create a mobile app with the help of a freeware software provided by Google called App
                     Inventor. With the help of App Inventor, we can create apps.

                          App Inventor

                     App Inventor is a free app development tool, provided by Google. With the help of App Inventor, we can

                     create apps for smart phones. The working of App Inventor is similar to Scratch programming language
                     in which we drag and drop blocks for making an app. App Inventor has two basic views:

                                                                                                     App Development   73

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