Downloaded the app. Theres a Starbucks two blocks from my house. Looked for it. The app failed to find it, but instead was happy to tell me about the one .5 miles away in a totally different neighborhood. In addition, that Starbucks is on our local restaurant row, which the app is nearly entirely unaware of.
Otherwise, it seemed to work just fine on my iPhone 4. Yet, fail. Deleted the app. Needs a HUGE upgrade to be useful.
Darreth about UrbanCompass