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.
The Table Talk Radio app is the iOS version of the popular Lutheran game show of the same name (http://www.tabletalkradio.org). You can play games like "Law and/or Gospel", "Table Talk Jeopardy", and others.