GPS track recording with voice feedback including distance and time. 

Speech output can be mixed with music so you can hear your progress and listen to music. No need to touch your iPhone/iPad once started, just listen to your progress via speakers or headphones. Allows the screen to dim and lock normally and will continue recording and reporting in the background so conserving battery life. Recorded tracks are saved on your iPhone and can be opened and viewed within the app. 

Full feature list here