PocketGuide is an iPhone/Android and Ovi app that provides a professionally voiced audio tour of the city based on your GPS location. The innovative part comes in as while taking the tour the app is tracking your route and allows the ability to share a 3D tour of tour trip along with embedded photographs and audio:
We really like PocketGuide, especially its offline mode so full tours can be played without being caught by high roaming data charges.
To find out more head over to http://www.mypocketguide.eu/en/pocket-guide-city-guide/