CageDoku: Killer Sudoku Puzzle

Killer Sudoku, finally without ads. CageDoku is a calm, beautiful home for Killer Sudoku and seven more logic-puzzle variants. Every puzzle is solvable by human technique — no guessing, no brute force — and every hint explains the why, not just the digit. ★ No ads. Ever. No banners, no pop-ups, no forced videos. The daily puzzles are free forever. Pro only adds extras. ★ 8 Sudoku variants in one app • Killer Sudoku — dashed cages with sums, no repeats inside a cage • Classic Sudoku — the timeless 9×9 logic puzzle • Thermo Sudoku — digits rise from the bulb along the thermometer • Arrow Sudoku — the digits on an arrow add up to the circle • Kropki Sudoku — white dot: consecutive; black dot: one is double • Sandwich Sudoku — clues give the sum between the 1 and the 9 • Chess (anti-knight) Sudoku — no equal digits a knight's move apart • Diagonal (Sudoku X) — both diagonals hold every digit once ★ Hints that teach Tap Hint and CageDoku names the technique, highlights the cells and walks you through the reasoning step by step: unique cage combinations, the rule of 45, innies and outies, locked candidates, pairs, triples, X-Wing and more. Learn Killer Sudoku while you play. ★ Five honest difficulty levels Gentle, Moderate, Tough, Diabolical, Extreme. A puzzle's level is the hardest human technique it needs — not a guess about how long it takes. ★ Daily 3 and streaks Every day the same three puzzles for everyone: a Killer, a rotating variant and a quick 6×6 Micro puzzle. Build your streak and protect it with a streak freeze. ★ Beautiful and calm Six themes, readable fonts, dark and light mode, big comfortable controls, pencil notes, auto-notes, undo/redo, drag to select several cells, vibration feedback. ★ Free to play, Pro if you want more Free: Daily 3, daily hints, dark theme, puzzle generation. Pro: unlimited hints and puzzles, statistics, the Weekly Variant Pack, streak freezes, all themes and fonts, PDF export. Pro is available monthly, yearly (7-day free trial) or as a one-time lifetime purchase. No account needed. Works offline. Your progress stays on your device. Privacy Policy: https://killersudoku.andrewboyko.name/privacy/ Terms of Use: https://killersudoku.andrewboyko.name/terms/