Polite is an application that helps you to keep your phone from making any noise. It works as a service that automatically takes care of the phone in silent mode. It is designed to help you in silent meetings and events. The application has a built-in calendar to help you in scheduling meetings. 

You can also have the phone enter silent mode during certain events such as meetings, classes, and so on. It can also be used during certain holidays, such as Thanksgiving, Christmas, New Year, and so on. You can set it up to work during specific times of the day. It also works as a service that you can use in the background.

The application is designed to work as a service. You do not need to install it as an application.