Horrible app! Waste of money!

I wish the developer gets back to me! I was completely trusting this app for my trip in Costa Rica and boy did I make a mistake? It does not work at all. Theres just a blank page and I was so disappointed having spent the money and relying on this app. It should be taken off the App Store! A complete disgrace!

Jude Sushil Kumar about Offline Costa Rica Map - World Offline Maps, v2.0