The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From WhiteHedge Technologies:
Are you bored with the usual poker games? Have you ever wished that you could pick which cards you put in your hand? Then try Diamond Swap Poker, the exciting new poker game that lets you trade cards between hands to win.You are dealt four poker hands with the end cards of each hand dealt face down. Then, you get three chances to trade cards between hands to improve your chances of winning. When you are done, the end cards are turned over. With four chances to win, you can have four times the action of regular poker. If you are up to it, try one of our challenge rounds. See how well you do in a 25 hand, 50 hand or timed round. Post your results on Facebook or Twitter and see if your friends can do better!