About
Engage in real-time Sudoku battles against friends or other players. Race to solve identical grids, claim squares first, and strategize with bonus cells and streak multipliers. Compete in leagues, wager in-game currency, and customize your experience.
What's New in Kosudoku
1.5
September 8, 2026
RANKING OVERHAUL Rank points now scale with the size of the match. Beat three opponents and you gain three times what you'd gain from beating one, while a loss always costs the same. No lobby size is worth farming any more. REBALANCED TIERS Bronze through Grandmaster now sit at thresholds you can actually reach, and your rank can no longer drop below zero. STILL NO ADS Kosudoku has never shown an advertisement and never will. No banners, no interstitials, no rewarded videos. Plus stability fixes and polish throughout.
MoreIn-App Purchases
$0.99
10 Quickets
Adds 10 Quickets to your balance.
FAQ
How does Kosudoku multiplayer work?
In Kosudoku, you and your opponent share the exact same Sudoku grid and solve it simultaneously. Your opponent's moves appear on your screen in real-time, color-coded by player. The first person to solve a square claims it.
Does Kosudoku have ads?
No, Kosudoku is completely ad-free. The developers state it has never shown an advertisement and never will, ensuring an uninterrupted gaming experience.
Can I play Kosudoku offline?
While the core multiplayer experience requires an internet connection, Kosudoku offers a solo play mode. This allows you to practice and chase your best times and scores offline.
What are Quickets in Kosudoku?
Quickets are the in-game currency earned through wins, streaks, and daily rewards. They can be spent in the store on cosmetic items like board skins, themes, fonts, and player colors.
How do the leagues in Kosudoku function?
Kosudoku features weekly league groups of up to 20 players. Finishing in the top three promotes you to a higher rank, while lower placements can lead to demotion. Ranks range from Bronze to Grandmaster.
Is Kosudoku available on different devices?
Yes, Kosudoku is fully cross-platform. You can challenge friends and compete in the same live matches, leagues, and leaderboards regardless of the device they are using.
What is the age rating for Kosudoku?
Kosudoku has an age rating of 12+. This indicates it is suitable for players aged 12 and older.
How often is Kosudoku updated?
The latest version of Kosudoku is 1.5, and it was last updated on September 8, 2026. This suggests a relatively active development cycle.