"Detour uses a phone’s GPS tracker to guide users on audio tours of neighborhoods, and providing background information and directions as listeners arrive at different landmarks, or “narration triggers.” Each tour takes around an hour to complete, but the actual time depends on the listener’s walking speed. And since it calibrates to your pace, there’s no need to pull out your phone and pause. This keeps the experience seamless and engaging."
Read more:
http://www.wired.com/2015/12/detour-audio-tour/
Read more:
http://www.wired.com/2015/12/detour-audio-tour/