I have already reported this issue through the Dino Hunter customer service "Contact" web site.
I just completed Region 8 and had Region 9 map pre-loaded. When selecting any of the icons the game freezes after it takes an energy bar. I have tried disengaging the app, leaving it in the background, but the game comes back to the same frozen screen when re-engaging it. I have restarted the game multiple times with the same result. I use reliable Wi-Fi and am able to play Deer Hunter and Contract Killer:Sniper on this device.
Using iPhone 4, 32 MB flash, iOS 7.1.2, 18.3 GB available memory.
iPhone 4, usually.