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FREE: Sudoku 4ever Plus For Android @ Amazon
Reviews
Unlimited number of puzzles, eight difficulty levels, world-class hint engine, game statistics and high scores
Eight different Sudoku variants: Classic & Jigsaw puzzles (aka Squiggly), Asterisk-, Centerdot-, Color-, Hyper-, Percent- & X-Sudokus
Thanks OP. This will keep me occupied for a while!