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Software designed for running on the Android operating system, a popular platforms used in cellphones, tablets and other mobile devices.Since Android was introduced, more than 400,000 Android apps have been developed and most of them are available for download from Google Play. Google Play is the online store hosted by Google. Apps on Google Play range include Freeware, Adware, and Pay Apps.SOURCES:== Sources and References == * [http://www.techsupportalert.com/best-free-android-apps.htm Gizmo's Best Free Android Apps]