Dungeon Hunter 5 is a free to play action RPG with in app purchases that range from $0.99 - $99.99 per item.
Con In app purchases used to remove false limitations
The main aspect of the included in app purchases is to remove wait times and long grinding sessions. Of course the game was specifically designed to have the obstacles in order to force players into paying repeatedly over the games life. Essentially, an endless money suck.
With in app purchases ranging from $0.99 - $99.99 per item it is pretty obvious that the game was designed to pull in as much money as they can convince people to plunk down.