No gimmicks here, just the sudoku you know and love. Choose one of six difficulty levels, from easy to diabolical, and the app will build you a new puzzle. To solve, tap the target square on the grid and the desired number on a panel at the bottom of the screen.
WIRED Can enter guesses when you don't have the solutions pinned down. Play several puzzles simultaneously.
TIRED No option for customizing the brown-on-brown color scheme.

