So I write an iphone app that lets people record GPS tracks, it's been out for a year, and I've told everyone. A friend also writes iphone apps. When his launch

So I write an iphone app that lets people record GPS tracks, it's been out for a year, and I've told everyone. A friend also writes iphone apps. When his launched, I bought it, wrote reviews, and gave him all of our app engine code to put up a quick website about the app. A few weeks ago, he emailed to ask if I knew of a good app to record GPS tracks. Argh.