No explanation, just the links…
http://itunes.apple.com/WebObjects/MZStore.woa/wa/browserRedirect?url=itms%253A%252F%252Fitunes.apple.com%252FWebObjects%252FMZStore.woa%252Fwa%252FviewSoftware%253Fid%253D328219302%2526cc%253Dde%2526mt%253D8

http://appventcalendar.com/navy-patrol-coastal-defense

http://itunes.apple.com/WebObjects/MZStore.woa/wa/browserRedirect?url=itms%253A%252F%252Fitunes.apple.com%252FWebObjects%252FMZStore.woa%252Fwa%252FviewSoftware%253Fid%253D336965285%2526cc%253Dde%2526mt%253D8