Screenshots from the App Store.
CrispSudoku is a polished, ad-free Sudoku game with real depth — four rule variants, six grid sizes, and a built-in tutor that explains how to solve every board. PLAY YOUR WAY • Four variants: Classic, Jigsaw (irregular regions), Sudoku-X (diagonals) and Killer (summed cages) • Six grid sizes: 4×4, 6×6, 8×8, 9×9, 10×10 and 12×12 • Four difficulties, from Easy to Expert • A new Daily Challenge every day — the same board for everyone LEARN AS YOU PLAY • "Explain the solve" walks through any board step by step, naming each technique (naked singles, hidden singles, locked candidates, X-wing and more) • "Next logical step" hints tell you what to play next, and why • Every puzzle gets an honest difficulty rating based on the hardest technique it actually requires THOUGHTFUL TOUCHES • Pencil-mark notes, unlimited undo, and live conflict highlighting • A mistake limit that scales with difficulty • Per-difficulty hint budgets, so hints stay meaningful • Beautiful themes you unlock as you play • Achievements, streaks and detailed statistics PRIVATE BY DESIGN • 100% offline — no account, no ads, no tracking, no data collection • Every puzzle is guaranteed to have exactly one solution CrispSudoku is free software, open source.
Heuristic score · not affiliated with Apple or Google.
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