If you buy new device you must istalled firstly this application in your friend phone to testing for have information about your dream android device. My Android application will help you know the following: 1- Applications: you will see the list of applications installed on the device and can search, sort, uninstall and run apps. 2- Memory: memory information of the device and the SD card. Free memory available and used memory. 3- Camera Information: Info about front and rear cameras. 4- Internet connection: We give information about Internet connection in your device: 2G, 3G, 4G or WiFi. 5- Screen size: screen resolution in pixels of your phone. 6- Density of the screen: low, medium, high, very high or extra extra high. 7- Memory RAM. 8- Version of Android: Android operating system name (KitKat, Jelly Bean ...) and version number. 9- Manufacturer and model of the device. 10-Qr-Code Reader 11-Sensor list:Shows all the sensors of your phone. 12-Compass:Carry your compass in your pocket. 13-Compare mobile phones: Just pick any two mobile phones and compare them. 14-Flashlight:Flashlight is now the best flashlight application on the Android Market. 15-Battery status:It shows the battery power and the battery charge level of your device. 16-Android Gif:Choose your best friend, make it your home page. 17-Operator:Which operator are you using.