Android (/ˈæn.drɔɪd/; an-droyd) adalah sistem operasi berbasis Linux yang dirancang untuk perangkat bergerak layar sentuh seperti telepon pintar dan komputer tablet. Android awalnya dikembangkan oleh Android, Inc., dengan dukungan finansial dari Google, yang kemudian membelinya pada tahun 2005. Sistem operasi ini dirilis secara resmi pada tahun 2007, bersamaan dengan didirikannya Open Handset Alliance, konsorsium dari perusahaan-perusahaan perangkat keras, perangkat lunak, dan telekomunikasi yang bertujuan untuk memajukan standar terbuka perangkat seluler. Ponsel Android pertama mulai dijual pada bulan Oktober 2008.
APK is a package of Android apps (Android PacKage). APK is generally used to store an application or program that will run on an Android device. APK is basically a compress file like a zip file, because it contains from a collection of files. APKs can be obtained through various methods, such as installing an app through the Play Store, downloading it from a website and then manually installing it, or creating and developing itself with a mostly Java-based language. If you have an APK file on your computer, and want to install it on your android, you can also run the command 'adb install apkname.apk' to install the application via USB to your android device.
Blackberry OS, iOS from Apple, and Android from Google Inc. into the operating system mobile is very popular and widely used. But Android, which is the operating system issued by Google Inc. is predicted to continue to grow and become the number one operating system in the world. In addition to relatively cheaper prices, Android is open-source.
Android's market share operating system has a steady growth in market sales from 2007 to the second quarter of 2012, well ahead of its rivals such as RIM Blackberry and iOS from Apple. With such data, Android will continue to dominate the Smartphone Operating System market in the years to come. And of course, this is good news for Android Application Developer.
A market research firm called Sensor Tower, has revealed its findings in the first quarter of 2017. Quoted Phone Arena, Monday (04/24/2017), the company gets data coming from applications other than games that include social media and productivity.
The data shown by Sensor Tower appears to be dominated by Facebook's app. Overall like WhatsApp, Facebook, and Messenger, the three most downloaded applications by smartphone users in early 2017. While other applications such as Instagram, Snapchat, UC Browser, and Uber are in the fourth position, five and six. Uber, Youtube, SHAREit, and Bitmoji, following the seventh to the 10th.
