Sparrow application is an effective tool to help you identifying apps that use dangerous permission. The powerful of Sparrow app is: it does not require any permission to work it is free available on Google Play and easy to use. Sparrow can scan your device and give you a hindsight onto which programs are dangerous and which ones are safe. This way you can be able to decide which applications are safe for use and which ones are not. Because some apps using permissions that read and modify your privacy such as : contact calendar photos logs location GPS and your personal information.