Simple Protocol Player is an Android media player developed by kaytat. This free app allows users to playback audio streamed by PulseAudio's simple protocol module. The main purpose of the app is to enable users to watch videos from XBMC running on Ubuntu, while having the audio played on their Android phone.

With Simple Protocol Player, users can easily stream audio from XBMC to their Android device, providing a seamless multimedia experience. The app also offers a utility for Windows users, allowing them to enjoy the same functionality.

Overall, Simple Protocol Player is a convenient media player that enhances the audio streaming capabilities for XBMC users on Android and Windows platforms.