Key features missing – Sudoku 101 (Free) Review

This is a nice looking app with great potential, but with a fatal flaw The lack of an undo button with a touch-screen interface means that you can get half-way through a diabolical puzzle and lose your pencilmarks to a missed touch. If that was fixed, this would be one of the best Sudoku apps out there, but as it stands I can't recommend downloading it.
Review by Ichtos on Sudoku 101 (Free).