Don't work – GPSmyCity: Walks in 1K+ Cities Review

Tried using it around my city, kept saying I'm not in the area. Been trying to find upgrade button nowhere to be found. Won't let me use the GPS when I click on it. It's basically just an app that you look at. Hopefully developer can help before I leave for my trip.
Review by ghgthgtdhk on GPSmyCity: Walks in 1K+ Cities.