Its a really fun and dynamic app, you set the time, exercise type (walk, run, mixed) and place (outdoors or treadmill). After that its just a lot of fun. A female coach voice guides and motivates you throughout the whole set, with the help of songs automaticaly adjusted acording to your pace. Several songs are included, you can customize the exercises on-th-fly, speed up, down, more inclination, etc. It is a really fun and impressive app. Really powerful! For PROS and NEWBIES !!!