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Fixed • The app no longer freezes on screens with the animated ghost • Difficulty tiers 4 and 5 now unlock from your progress in that puzzle alone, not your overall level Better • Killer Sudoku hints now always find your next step, even on Master boards
18 number puzzles without ads or purchases. Sudoku & Killer Sudoku, offline.
Eighteen number puzzles. One ghost. Zero interruptions. GridJoy is a free number puzzle game with 18 puzzle types in one calm app — Sudoku, Kakuro, Killer Sudoku, Calcudoku and 14 more. No subscription, no paywall, no in-app purchases, and no ads — anywhere, ever. Solve, earn cosmetics for your ghost companion, and come back tomorrow for a fresh daily. YOUR GHOST COMPANION A floating ghost mascot cheers you on. Customise it with 550+ cosmetics — hats, faces, halos, backgrounds, and body colours. Unlock new styles as you level up. Your ghost, your way. 18 NUMBER PUZZLE TYPES Not just Sudoku. GridJoy includes: - Sudoku (Classic, X, and Hyper variants) - Kakuro (Cross Sums) — sum-clue number runs - Calcudoku (Mathdoku) — cage arithmetic challenges - Killer Sudoku (Sumdoku) — Sudoku meets Kakuro - Inequality (Futoshiki) — greater-than logic puzzles - Shikaku — rectangle partition puzzles - Starlink (Hidato) — path-finding number chains - Countdown — build target numbers from 6 tiles - Number Crossword — numeric crossword grids - Takuzu (Binairo / Binary Puzzles) — binary balance puzzles - Hitori — shade duplicates - Sumplete — row and column sum elimination - Number Blocks — block placement logic - Skyscraper (Towers) — border-clue visibility puzzles - Number Maze — linear path-finding grids - Hex Mazes — hexagonal path puzzles - Square Maze — classic wall-based mazes - Circular Maze — radial path-finding Each type has up to 5 difficulty levels from Easy to Master. Find your perfect challenge. DAILY CHALLENGES & STREAKS A new puzzle every day. Build your streak. Compare your solve time with players worldwide. Never run out of fresh puzzles. SEASONAL EVENTS Six rotating "Hauntings" throughout the year — each with unique cosmetic rewards. All free, no premium pass required. SMART HINTS Stuck? Every puzzle gives you three free hints, in three tiers that guide you without spoiling the solve: 1. See which numbers fit a cell 2. Learn the solving technique to use 3. Reveal a cell's answer PLAY OFFLINE Puzzles work offline — GridJoy generates them on-device. Solve anywhere, on the bus, on a plane, in the park. Your progress, leaderboards, and daily gifts sync when you're back online. LIGHT & DARK THEMES Choose your style. Beautiful dark glassmorphism for night-time puzzling, or a clean light theme for day. Switch anytime in Settings. PROGRESSION SYSTEM Earn XP for every solve. Level up to unlock new ghost colours and cosmetics. Complete missions for bonus rewards. Track your personal bests across all 18 puzzle types. RANKINGS & CHALLENGES Compete on global leaderboards — sorted by XP, streak, solve count, or Arena wins. Enter an open Arena challenge and race everyone else on the same board, or challenge a friend to a head-to-head number duel. See how you stack up. MASTERY SYSTEM Earn Bronze, Silver, Gold, and Diamond mastery per puzzle type. The harder you push, the more you unlock. Track personal bests across all 18 types. FREE TO PLAY No subscription. No premium pass. No in-app purchases at all. And no ads — none, anywhere, ever. No banners, no interstitials, no rewarded video. GridJoy is funded by one developer, not by your attention. That's it. No reading required — every puzzle is numbers and logic, so language is never a barrier. GridJoy — 18 number puzzles, one ghost, zero words.