Sudoku Ignite is a sudoku app that teaches you to get better at sudoku.
Every hint names the technique it used and explains the reasoning in a sentence. You will learn to spot a hidden single, a pointing pair, an X-Wing, and to read pencil marks the way experienced solvers do. A built-in Techniques reference explains every strategy the hint guide can use, in the order it tries them, each with a worked example.
NINE KINDS OF BOARD, 3,100 PUZZLES
• 6×6 — the place to start. Same rules, a third of the squares.
• 9×9 — classic sudoku in five difficulties, from easy to guru.
• 16×16 and 25×25 — large grids with pinch-to-zoom, in five difficulties.
• Jigsaw — nine irregular regions replace the boxes.
• Killer — cages that add up to a total, with only a handful of starting digits.
• Odd/Even — circled squares hold even numbers, so every square starts half solved.
• Thermo — values rise along each thermometer, shown as a cool-to-warm gradient.
• Samurai — five overlapping 9×9 grids on one board, in three difficulties.
Every puzzle is distinct and has exactly one solution. Difficulty is graded by the techniques a board actually needs, not by counting clues, and each tier is kept tight so two boards at the same level feel the same.
DAILY CHALLENGE
One puzzle a day, the same for everyone, in your choice of Classic, Jigsaw, Odd/Even or Killer. Build a streak and see your daily history on a calendar.
PLAY YOUR WAY
• Free input by default: enter what you think, then Undo, Redo or Erase.
• Optional guided input that only accepts correct entries.
• Optional mistake checking and a three-mistake limit.
• Pencil marks that stay legible: up to four per square, drawn large, or automatic candidates for every empty square.
• Pick up where you left off with a one-tap Continue on the home screen.
STATISTICS
Best and average times for every board type and difficulty, total solves, perfect solves, and your daily streak.
MADE TO BE READ
A warm, calm design with light, dark and high-contrast themes, a reduce-motion option, and clear board markings for every variant: dashed cages, tinted overlaps, gradient thermometers.
Works entirely offline. No account, no ads.
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