In today’s world everything is controlled by Smart phone .Smart phone requires an Application popularly known as APP. An APP is a piece of software which is written to perform a specific task.Today, Android is the most popular operating system for Smartphone users. As per recent research, 1.5 million Android devices are activated around the globe. Over 6,00,000 apps run on Android platform, which helps the user to become smarter. In coming years, the demand for Android app is expected to double. There is an enormous increase in the number of Smartphone users and subsequently the demand for Android application developers have gone up.