While the Music/iPod apps on your iOS device let you shuffle between all your songs, or between the songs on an album, Album Shuffle plays back a whole album, and then shuffles on to a new album. Or just shake to shuffle again.
If you want to listen to a particular album, just long-press on the shuffle button to see a list of all the albums on your device, and pick the one you’re after.
For news of updates etc. check out https://www.facebook.com/AlbumShuffle