RunTrack app for iPhone and iPad
RunTrack is an application that tracks your walks and runs through a built-in pedometer. Unlike other applications, this pedometer locks onto your GPS position, for the most accurate tracking possible.
All runs are stored for you to review and see on a map. The data can even be exported into a KML that can be emailed to anyone and added to Google Earth or Google Maps on a PC or Mac.
Continued use of GPS may dramatically decrease battery life.