Best $1.99 I've Spent? – Satori Sudoku Review

Probably. There was this bottle of wine when I was 17, but... another story. This is a clean, smooth working interface; it is challenging and fun. The only way you'll go back to paper games is if your iPhone battery dies and there's no plug around for you to plug back in so you can play so more.
Review by templetonmd on Satori Sudoku.