CageDokuNo ads. Ever.ThermoArrowKropkiSandwich
Killer Sudoku, finally without ads.
Eight logic-puzzle variants in one calm app. Every puzzle is solvable by human technique — no guessing, no brute force. Hints explain the why, not just the digit.
Coming soon to the App Store and Google Play
No ads. Ever.
No banners, no pop-ups, no video interruptions. The app is free to play every day; Pro only adds extras.
Hints that teach
Every hint names the technique, highlights the cells and shows the reasoning step by step.
Daily 3 and streaks
A Killer, a rotating variant and a quick 6×6 every day. Keep your streak with a free streak freeze.
Beautiful and calm
Six themes, readable fonts, dark and light mode, and one-handed play.
Eight variants, one app
KillerClassicThermoArrowKropkiSandwichChessDiagonal
Five levels, honestly rated
1 · Gentle2 · Moderate3 · Tough4 · Diabolical5 · Extreme
Difficulty is the hardest human technique the puzzle needs — not a guess about how long it takes.
Free to play. Pro if you want more.
Daily 3, hints, dark theme and puzzle generation are free. Pro unlocks unlimited hints and puzzles, statistics, streak freezes, all themes and PDF export.
Learn Killer Sudoku
Rules · Cage combinations · Variants · Solving tips · Printable puzzles