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Each grid is a real sudoku. Solving a smaller puzzle reveals one number in the grid above it. You can also guess numbers directly on the larger grid — but you won't be told if a guess is wrong until you complete it or solve the underlying puzzle.
You get 3 hints each day. Unused hints do not carry over — a fresh 3 arrive at midnight.
Yes. Everything is saved automatically on your device. Note that deleting the app will erase your progress, since nothing is stored online.
Pyramid Sudoku is completely free with no ads and no purchases.
Zen mode removes the timer and error highlighting so you can solve at your own pace with no pressure.