A friend told me about this App called "Track Addict". I bought the 9 dollar version and am pretty happy with it. Not as complete as some of the other apps I have used but by far the simplest and easiest I have ever used. Doesn't even need an external GPS. Here's a demo I made in a parking lot.
https://www.facebook.com/steve.jonel...3732885766332/
Here's the link for the app
http://racerender.com/TrackAddict/do...ngStarted.html