Meet your ghost. Solve number puzzles. Collect cosmetics.

GridJoy is a free number puzzle game with 18 puzzle types in one app — from classic Sudoku to brain-bending Calcudoku, from relaxing Mazes to strategic Kakuro. Every puzzle is a new challenge. Every solve earns rewards.

YOUR GHOST COMPANION
A floating ghost mascot cheers you on. Customize it with 440+ 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 — border-clue visibility puzzles
- Mazes — linear path-finding grids
- Hex Mazes — hexagonal path puzzles
- Square Maze — classic wall-based mazes
- Circular Maze — radial path-finding

Each type has 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? Three tiers of hints guide you without spoiling the solve:
1. See which numbers fit a cell (free)
2. Learn the solving technique to use (free)
3. Reveal a cell's answer (watch a short ad)

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, solve count, streak, or puzzle mastery. Challenge other players to head-to-head number duels. 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. Ads never interrupt a puzzle in progress. Watch optional rewarded ads for extra hints and daily gift recovery — a brief interstitial may appear when you return to the hub after a long session, and banners run on lobby screens (Home, Library, Leaderboard) only — never on a puzzle. That's it.

GridJoy — 18 number puzzles, one ghost, zero words.