The full paid version is again free for the weekend. Get it here: https://itunes.apple.com/us/app/big-bad-sudoku-book/id364907966?mt=8
Has issues with iPhone 5: Had to reinstall again since interface was unresponsive to touch After reinstalling, it was initially responsive again but when I would try to change or cancel an entry, the screen would freeze up. I am using iOS 6.1.3, non-jail broken with about 10 gb available
