Sudoku: Logic Number Puzzle

Sudoku brings classic 9x9 logic to your phone, rated by the actual techniques a puzzle needs -- not just by how many starting numbers it has. Fill every row, column, and 3x3 box with the numbers 1 through 9, with no repeats anywhere. Use notes to track candidates, and ask for a hint when you're stuck -- it always reveals a cell you were close to working out yourself. FEATURES • Four difficulty tiers, each rated by real solving technique • 800 hand-verified puzzles with a single unique solution • Notes with auto-clear as you fill in numbers • A daily challenge with its own streak • Unlimited undo and a configurable mistake limit • Play Games leaderboards and achievements (sign-in optional) Sudoku plays completely free, with optional purchases for extra hints or the Expert difficulty pack -- nothing is required to play. No real-money wagering. Just the grid, and the logic to solve it.