- The concept of Android. Android is an open source and Linux-based operating system for mobile devices such as smartphones and tablet computers. Android was developed by the Open Handset Alliance, led by Google, and other companies. - The concept of IOS. iOS is a mobile operating system developed and distributed by Apple Inc. It was originally released in 2007 for the iPhone, iPod Touch, and Apple TV. iOS is derived from OS X, with which it shares the Darwin foundation. - Experience. I have built Tracking, Food ordering, Photo processing mobile app for Android and IOS version and published to store. - Service. I always provide quality and satisfied service to my clients.