Sumoku: Number Logic Game

I built Sumoku as a Christmas gift for my mom who does these number puzzles in her puzzle books. If you like Sudoku, you'll pick this up fast. Fill every row and column with unique numbers, and make every cage add up to its target sum. Free, no ads, no doomscrolling. Just the kind of brain workout that actually feels good. Hope you love it!

Sumoku! Where Numbers Meet Strategy

PLAY FOR FREE
Sumoku is free to play.
Optional in-app purchases are available for extra Mochis to spend on lives, hints, and Zen mode (skins, board themes and unlimited puzzles)

SIX GRID SIZES (4x4 through 9x9)
Sumoku is for beginners to advanced players.
Start with approachable 4x4 grids and work your way up to brain-bending 9x9 puzzles.
Each size offers Easy, Medium, and Hard difficulties, that's 18 unique challenge levels to conquer!

COMPETE & CLIMB THE LEADERBOARD
Connect with Apple's Game Center to track your scores across Classic, Time Attack, and Streaks leaderboards.
Filter by grid size and difficulty to see how you stack up against players worldwide.
Earn your spot on the podium!

100+ ACHIEVEMENTS TO UNLOCK
From your first puzzle win to mastering 9x9 on Hard without mistakes, there's always a new milestone to chase.
Achievements span Beginner, Scoring, Mastery, Speed, Streaks, Challenges, and more.

BATTLE A BOT
Test your speed against AI opponents in head-to-head Bot Battles.
Choose your grid size and difficulty, then race to finish first.
Bot Battles have their own scoring, can you outsmart the AI?

SMART TOOLS
Pencil Mode: Jot down candidate numbers as notes before committing
Magnifier: Zoom into cages for a closer look on larger grids
Hints: Use a hint to reveal a cell and keep your momentum going
Auto-Notes: Let the game pencil in candidates on hard 8x8 and 9x9 puzzles
Smart hints: Understand why a number was entered into a cage using Sumoku techniques
Smart Input/ Pencil: When you select a cell, the keypad greys out the numbers that can't legally go there
Lock-In: Submit all your pencil notes at once for a bold, high-risk play


EARN & SPEND MOCHIS
Earn Mochis by completing puzzles, achieving perfect Medium and Hard games, hitting score milestones, and maintaining daily streaks
Spend them on extra lives and hints when you need a boost, or stock up in the Mochi Shop.

BUILT FOR YOUR STYLE

Dark Mode with a sleek, modern blue palette
Clean design with smooth animations
Auto-save so you never lose progress, even if you close the app
Daily streak tracking and weekly recaps to keep you coming back
Multiple active games — juggle different grid sizes at once

Love puzzles? Challenge yourself with Sumoku and see how far your logic can take you!