PowerTop

Hello, (A new poster with a question) What are the lead times and costs of building geo-locational app. I don't mean Foursquare, but I mean more like this: https://itunes.apple.com/gb/app/festival-ready/id634884365?mt=8 - It has all the check in functionality but isn't as vast (I think?). Or is it equally as comlpicated - and therefore expensive? Thank, S.