The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Okan Besli:
All Kings and Queens from William I. to Queen Elizabeth II. Application contains ordered list of all king and queens of British Royal Family and give short summary information about their lives.You can share the details of a king or a queen via e-mail.