# Kosudoku: Multiplayer Sudoku — Puzzle Battles with Friends > Real-time, ad-free Sudoku battles with friends and leagues. (iPhone/iPad app by Paul Kim.) - Source: https://appshunter.io/ios/app/kosudoku-multiplayer-sudoku/id6768148437 (this page in markdown: same URL + `.md`) - Developer: [Paul Kim](https://appshunter.io/developer/1896544671) - Category: Games, Board, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings - Age rating: 12+ - Requires: iOS 17.0 · 23 MB - Languages: American English - Released: 2026-08-25 - Data updated: 2026-09-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/kosudoku-multiplayer-sudoku/id6768148437/reviews.md ## What is Kosudoku? One Sudoku grid. You and a friend. Both solving it at the same time. NO ADS. Not a banner, not a video, not one that appears "just this once" between games. Kosudoku has never shown an advertisement and never will. Kosudoku is Sudoku as a live race. You and your opponent get the identical board and fill it simultaneously — their guesses appear on your screen the moment they make them. Every square belongs to whoever solves it first. Hesitate on a cell you'd worked out, and you'll watch it turn their colour. That's the whole game: a shared grid, a running scoreboard, and the pressure of knowing someone else is looking at the same empty square you are. Add a friend, build a head-to-head record, and settle it again tomorrow. RACE ON ONE BOARD • Up to 4 players on a single shared puzzle, live. • See opponents' attempts land in real time, colour-coded by player. • Claim a square by solving it first — it's yours, and it's gone for everyone else. • Wrong guesses cost you points, so speed alone won't win it. BUILD A STREAK, HUNT THE BONUS CELLS • Chain correct answers to raise your streak multiplier. • Gold cells double your points. Rainbow cells triple them. • Land a streak on a bonus cell and the score jumps. PLAY SOLO ANY TIME • Four difficulties, from Easy to Expert. • Chase your own best times and scores. • Every solo game still feeds your league points and rank. CLIMB THE LEAGUES • Weekly league groups of up to 20 players. • Finish top three to promote — slip and you drop. • Ranks run Bronze through Grandmaster. PUT SOMETHING ON IT • Wager Quickets on a match. Everyone matches the stake, winner takes the pool. • Earn Quickets from wins, streaks and daily rewards. • Spend them in the store on board skins, themes, fonts and player colours. PLAY WITH FRIENDS • Add friends, see who's online, challenge them directly. • Schedule a match for later and get a reminder when it's time. • Chat in the lobby and mid-game. CROSS-PLATFORM Kosudoku is fully cross-platform — challenge any friend and compete in the same live matches, leagues and leaderboards, whatever device they play on. NO ADS, EVER Kosudoku is completely ad-free. No banners, no interstitials, no rewarded videos, no "watch an ad to continue". Your board is never interrupted. Free to play and ad-free, with optional in-app purchases. ## Key features - Real-time multiplayer Sudoku races - Shared puzzle grids with live opponent updates - Streak multipliers and bonus cells - Solo play with adjustable difficulty - Weekly league competitions - In-game currency for customization - Cross-platform play ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | 10 Quickets | $0.99 | one-time | | 35 Quickets | $2.99 | one-time | | 65 Quickets | $4.99 | one-time | | 150 Quickets | $9.99 | one-time | ## Frequently asked questions about Kosudoku ### 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. ## Version history (last 5 releases) ### 1.5 — 2026-09-08 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. ### 1.4 — 2026-09-03 Music is back. The intro track, the full song and the end-of-game outro all went silent in the previous version. This update restores them. Rank points are now zero-sum — the winner gains exactly what the other players lose, so a win counts for more in a bigger lobby. Rank tiers are much easier to reach, and your rank no longer drops below zero. ### 1.3 — 2026-08-29 Pencil marks now clear themselves. When a square gets solved, that number disappears from the notes in its row, column and box — including when an opponent claims it. Rules & Scoring is now reachable from any score breakdown, so you can check how points work without leaving the game. Retired the animated player colors and added eight new premium ones: Obsidian, Platinum, Champagne, Sapphire, Ember, Peacock, Orchid and Bronze. Gift amounts now start at the actual minimum instead of an amount that would be rejected. Fixed the board resizing slightly when you finished a solo puzzle. ### 1.2 — 2026-08-28 Your name, your crew, better referrals. • Referrals now reward BOTH of you — you and the friend who uses your code each get 20 Quickets. • Referral codes now stay valid for 30 days instead of 3. • Anyone who joins with your code is added as a friend automatically, and you'll get a notification telling you who joined. • Pick a display name when you sign up, so friends and referrals show the name you chose instead of a placeholder. • Kosudoku now runs on iOS 17 and later, so more of your friends can play. • Assorted fixes and polish. ### 1.1 — 2026-08-27 Fresh new look with an updated board color scheme, plus performance improvements and bug fixes. Thanks for playing Kosudoku! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*