Great to have an app version of the game. I paid $0.99 and feel that the pricing may be holding development back. Its a great game. Id easily pay $5.99-$9.99 if the following changes were made:
Multiplayer - difficult to follow with AI players. The tiles placed all appear in a flash and you cant really tell what others have done.
Advanced board game features added (expansion?)
Online - can be difficult to get a game set up. Delay in challenges being received
All in all great 5 star game with 3 star online interconnectivity
Kborion about Reiner Knizia Tigris&Euphrates, v1.2