Spiderette Solitaire for the iPad.
There are three difficulty levels, 1 suit, 2 suits or all 4 suits, so anybody can play from the most experienced user, to a novice.
Simply create 4 stacks of cards from Ace to King with the correct suits.
Complete with Game Center to you can compete against all your friends.
Version 1.5 has been approved by Apple, and contains a number of bug fixes, UI overhaul, the ability to save and load games, undo moves, as well as iOS 5 features.
To get this update download the universal application.