Settings App - Very fun and useful app that can ease your life. It was created in order to change the settings of other apps, specifically their sound, access other applications, and settings in General. In fact it is the application which helps to manage other applications at the same time you don't even need root rights, which will make it easier to use. All the functions which it can configure not to list immediately, you will be able to configure the vibration mode in which the application will always be included, and much more. So install it and see for yourself how this app is unique.