The concept is so simple used for play video and audio files Everyone have mx player in there mobile smart phones. I personally like it because it has very good layout and deaign which is easy to understand this app and easy to use.it has great feature to handle videos in your own way it has features like A-B repeat option then can play dual audio movies , zoom in whenever I want.it is useful for playing any video but it doesnt plays ac3 format audio file.