--- title: "Unisu – Sudoku app for iPhone and Android" description: "Unisu is a Sudoku app for iPhone and Android. Play without ads, keep pencil marks and explore the reasoning behind a move when you get stuck." lang: "en" canonical: "https://unisu-sudoku.app/en/" --- Sudoku for iPhone and Android · No ads # Your next Sudoku. At your own pace. Unisu is a Sudoku app for iPhone and Android. Play without ads, keep pencil marks and explore the reasoning behind a move when you get stuck. - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) ![Unisu on a phone with classic Sudoku](https://unisu-sudoku.app/_astro/en.GNBhkVUm_Z1uUeJ1.webp) ## A puzzle for today A daily challenge for a spare moment ## No ads Keep your attention on the grid ## Hints and lessons Follow the reasoning behind a move ## Works offline Puzzles and lessons are stored in the app - Pencil marks - Explained hints - Daily puzzle - 16 levels - Lessons - Offline ## Room for the puzzle. And your train of thought. Sometimes you need one clue, rather than the rest of the solution. Unisu pairs the classic grid with pencil marks, staged explanations and lessons on individual techniques. ### No ad interruptions ### Keep your own pencil marks ### Read why a move works ### Practice one technique at a time ### Adjust the display and feedback ## Tools for your next move Sometimes you need one clue, rather than the rest of the solution. Unisu pairs the classic grid with pencil marks, staged explanations and lessons on individual techniques. ### Numbers and pencil marks Enter a number you can justify, or keep small notes for the possibilities. Recheck affected cells after a move. ### An explanation in stages Start with the relevant area, then read the reasoning and the specific move. You still enter the number yourself. ### The daily puzzle A new puzzle for the day. Your Streak counts consecutive days on which you finish a puzzle. ### One technique at a time Lessons run from Full House to more involved chains. Guided examples lead into tasks you can try yourself. ### Your progress Statistics record your puzzles and results, giving you a way to look back at previous games. ### A setup that suits you Adjust colors, text size, sound and haptics in settings. ![A classic Sudoku game in Unisu](https://unisu-sudoku.app/_astro/en.C6DJ1kiE_2dRWDN.webp) - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) ## A look inside Unisu See the actual puzzle and lesson screens, then choose the store for your phone. Daily puzzle ### Today’s puzzle For the moment when you want a fresh grid. [Download app](https://unisu-sudoku.app/en/#download) ![The daily challenge in Unisu](https://unisu-sudoku.app/_astro/en.C-sYR9hJ_1QwI9G.webp) Lessons ### Explore a technique Choose a lesson and follow its reasoning on a real grid. [Browse the learning guides](https://unisu-sudoku.app/en/learn/) ![Practising techniques in Unisu](https://unisu-sudoku.app/_astro/en.C6UTKThv_Z1P6nlS.webp) - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) Learn ## Where would you like to start? ### New to Sudoku? Start with the rules and a row with one number missing. [Read more: New to Sudoku?](https://unisu-sudoku.app/en/sudoku-rules/) ### Getting back into it Use a repeatable search order to work with the clues already on the grid. [Read more: Getting back into it](https://unisu-sudoku.app/en/sudoku-without-guessing/) ### Working on a pattern Find your way through singles, pairs, wings and chains. [Read more: Working on a pattern](https://unisu-sudoku.app/en/sudoku-techniques/) Learn the rules, return after a break or make sense of a particular pattern. Choose the guide that fits what you need now. [Browse the learning guides](https://unisu-sudoku.app/en/learn/) ## An idea for your next puzzle Each guide explains a principle through one example. The app gives you a place to practice it step by step. Fundamentals Unisu · Oct 26, 2026 ### [How to play Sudoku: rules and your first move](https://unisu-sudoku.app/en/sudoku-rules/) One of each number in every row, column and 3×3 box: learn the rules of classic Sudoku and follow a first certain move. Fundamentals Unisu · Oct 27, 2026 ### [Sudoku pencil marks: track and update candidates](https://unisu-sudoku.app/en/sudoku-techniques/pencil-marks/) A small note records a possibility. Learn how candidates differ from placements and how to keep them up to date. Fundamentals Unisu · Oct 26, 2026 ### [Sudoku help: find a logical next move](https://unisu-sudoku.app/en/sudoku-hints/) Stuck on a Sudoku? Follow a checklist, work through one certain move and see how Unisu’s three hint stages explain the next logical step. [Browse the learning guides](https://unisu-sudoku.app/en/learn/) ## Frequently asked questions ### What can I do in Unisu? Solve classic 9×9 Sudoku, keep candidate notes and understand your next logical move. Explained hints and guided lessons help along the way. ### Is Unisu available for iPhone and Android? The website links to Unisu in the App Store and Google Play. Choose your phone’s store for the requirements of the version offered there. ### Can I use Unisu offline? Puzzles, lessons and saved games are local to the installed app. Downloads, updates, external links and sending a message need a connection. ### Do I have to watch an ad for a hint? The current app has no advertising. You do not need to watch a video to open a hint. ### Is everything in the app free? The current version has no in-app purchases. Check the relevant store for its price and included content. ### Can I play on this website? This website contains explanations and a look at the app. Download Unisu to your phone to play. ## More about the app ### Sudoku with no ads: what Unisu offers The current Unisu app contains no ads. Here is what that means for play and the available app features. [Read more: Sudoku with no ads: what Unisu offers](https://unisu-sudoku.app/en/sudoku-no-ads/) ### Play Sudoku offline with Unisu Puzzles, lessons and saved games are local to the installed app. Downloading the app and sending a request need a connection. [Read more: Play Sudoku offline with Unisu](https://unisu-sudoku.app/en/sudoku-offline/) Download app ## Ready for a puzzle? Take a moment. Download Unisu on your phone. Start a Sudoku or choose a lesson on the technique you want to understand. - [Download on the App Store](https://apps.apple.com/us/app/id6775824061?l=en) - [Get it on Google Play](https://play.google.com/store/apps/details?id=app.unisu.sudoku&hl=en) ![The daily challenge in Unisu](https://unisu-sudoku.app/_astro/en.C-sYR9hJ_1QwI9G.webp) ![A classic Sudoku game in Unisu](https://unisu-sudoku.app/_astro/en.C6DJ1kiE_2dRWDN.webp)