Glitchoku

Fast, Futuristic Sudoku with Streaks and Timed Moves.

The same 9×9 grid. The same pure logic — every puzzle solvable by reasoning alone. Then Glitchoku does what other Sudoku games don't: it gets your heart pounding. What's the last time you felt that while playing a Sudoku?

Fully offline. No ads, no sign-up, no paywall.

THREE WAYS TO PLAY

⏱️ OVERCLOCK — One clock for the whole board, and it is already running. Every correct digit buys time back, and the quicker you solve the more it pays. Beat the break-even pace and the clock climbs instead of draining. Finish a 3×3 box for a big refill. Three lives, and one wrong digit costs you one.

⚡ BLITZ — 30 seconds a move, with a pursuer on your tail. Every mistake and every timeout lets it close a step. Five correct in a row pulls you one clear. Let it reach you and the run is over — so a streak is not just points, it is distance.

📜 CLASSIC SUDOKU — No clock. No score. No pressure. Just the puzzle, deep undo, and your own best time to beat. Put it down for a week and pick it up where you left it.

▬▬▬ FOUR REAL DIFFICULTIES ▬▬▬

Not the same board with fewer digits showing. Each tier is cut on the hardest technique it genuinely needs:

• EASY — naked singles. Where beginners should start. • MEDIUM — hidden singles. • HARD — naked and hidden pairs, pointing pairs, box/line reduction, X-Wing. • EXPERT — Swordfish, XY-Wing, simple colouring, forcing chains.

Expert stays locked in a mode until you have finished three Hard boards there. It is not a menu option. It is a thing you earn.

▬▬▬ LEARN TO SOLVE ANYTHING ▬▬▬

Never cracked a hard sudoku? How to Play teaches every technique on a real board, one step at a time — last position, last candidate, naked singles, hidden singles, naked pairs, hidden pairs, naked triples, pointing pairs, box/line reduction, X-Wing, Swordfish, XY-Wing, colouring and chains.

Interactive lessons you play, not a wall of text you scroll. Learn the techniques once and no sudoku puzzle is ever closed to you again.

▬▬▬ ENDLESS PUZZLES, NEVER THE SAME ONE TWICE ▬▬▬

Every board is generated fresh on your device and checked to have exactly one solution — so a puzzle is never ambiguous, never unfair, and never one you have already solved. No puzzle packs to buy. No daily limit. No lives to sit and wait for.

▬▬▬ TOOLS ▬▬▬

• Pencil marks and candidate notes • Auto-eliminate — a placed digit strikes itself from its peers • Undo in classic mode, 200 moves deep • Save any board and finish it later • Personal bests, full Mission Records, and a move-by-move replay of every run you have played • No hints and no auto-solve. You finish the board, or nobody does.

▬▬▬ PERFECT FOR ▬▬▬

• Beginners learning how to play sudoku from scratch • Veterans who want expert sudoku puzzles that actually fight back • A five-minute brain teaser on the commute • Anyone tired of sudoku games buried under ads, pop-ups and paywalls

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Whether you want a calm classic sudoku puzzle to unwind with before bed, a daily brain training workout, a logic puzzle that actually teaches you something, or a genuinely hard number game that punishes one sloppy guess — Glitchoku is the free offline sudoku app that finally makes the world's best puzzle game feel fast.

Nine digits. One grid. No excuses.