Today Android has the biggest market share as compared to other operating system for Smartphone. As users are continuously increasing day-by-day the security is one of the main concerns for Smartphone users. As the features and power of Smartphone are increase, so that they has their vulnerability for attacks by malwares. But the android is the operating system which is more secure than any other operating systems available for Smartphones. The Android operating system has very few restrictions for developers and it will increase the security risk for end users.