Fit Music is a music player application with a capability to change songs according to the user speed.If you dont start running mode, you can use the application as a standard music player. If you start a running mode, your speed will be measured constantly and songs you listen will be changed automatically according to your running speed.When you walk or run slowly, songs from Slow Songs Playlist are played. When you run faster, songs from Fast Songs Playlist are played.In the Change Thresholds section, you can arrange the speed boundaries to decide when to change songs according to your speed.Your running history is saved so that you can check your running data.You can also see your running route on the map.