# suuudokuuu: Sudoku Puzzles — Infinity Mode & SE Ratings > Challenging Sudoku puzzles with customizable themes and competitive modes. (iPhone/iPad app by Vitalii Yehorov.) - Source: https://appshunter.io/ios/app/suuudokuuu-sudoku-puzzles/id6449440933 (this page in markdown: same URL + `.md`) - Developer: [Vitalii Yehorov](https://appshunter.io/developer/1689109738) - Category: Games, Casual, Board - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.4 · 59 MB - Languages: American English - Released: 2023-05-29 - Data updated: 2026-09-09 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/suuudokuuu-sudoku-puzzles/id6449440933/reviews.md ## What is suuudokuuu? suuudokuuu is Sudoku the way it should be: fast, beautiful, and honest about difficulty. Seven levels, from a gentle Newbie board to Infinity — the hardest Sudoku puzzles ever composed. No ads pretending to be puzzles, no accounts, no nonsense. Just you and the grid. EVERY PUZZLE, RATED Most apps label a board "expert" and hope you don't look closer. We put a number on it. Every puzzle carries a Sudoku Explainer rating on the 1.0 to 12.0 scale serious solvers use, shown right in the level pill on the board, in your history, and on every link you share. A built-in explainer tells you what the number actually measures — how hard the puzzle is to reason through, not how few clues it has. INFINITY: THE WORLD'S HARDEST SUDOKU A curated set of 100 world-record puzzles rated SE 10.4 to 11.9. Arto Inkala's Everest and AI Escargot. Golden Nugget. Platinum Blonde. Kolk, Patience, Fata Morgana, Red Dwarf. These are the grids the solving community made famous, and most people never finish one. HELL, RE-CURATED Hell is now 1,544 verified 17-clue puzzles, every one rated SE 6.6 or higher. Seventeen clues is the fewest a Sudoku can have and still have exactly one solution — but a low clue count alone doesn't make a puzzle hard, so we rated the whole corpus and kept only the boards that fight back. YOUR SOLVING, MEASURED The redesigned statistics screen shows your hardest solve, your recent average difficulty and the level you play most. The SE spectrum plots every puzzle you've finished across the scale. Your arsenal counts every technique you've actually used — naked pairs, X-Wing, swordfish and further — so you can watch your repertoire grow. CHALLENGE A FRIEND Rival mode sends your exact puzzle to a friend as a share link, with your recorded run attached. They play the same grid you did and race your time move for move. Bragging rights, settled. WATCH IT BACK Every finished game replays move by move, and each history card carries a summary of the techniques that solved it. PLAY YOUR WAY Pick Classic, Gold or Newspaper, or open the live-preview theme editor and make every cell, line and highlight yours. Built-in contrast validation keeps custom themes readable in light and dark. On the web there's full keyboard control: arrows to move, digits to place, Space or N for pencil mode, Shift and a digit for candidate marks, A for auto-candidates. EVERYTHING ELSE YOU'D WANT • 7 difficulties, Newbie to Infinity • An SE difficulty rating on every puzzle • Full theme engine with light and dark support • Rival challenges via share link • Move-by-move replay with technique analysis • Technique-aware scoring • 13 languages • Works fully offline • No account, no sign-up, ever • Free and open-source suuudokuuu is built for people who actually love Sudoku, not people who want to be sold a subscription. Download it, pick a difficulty, and find out what your number is. Learn more at www.suuudokuuu.com. ## Key features - Six difficulty levels, including Hell - Full theme customization with live preview - Rival mode for challenging friends - Move-by-move game replay - Technique-aware scoring - Offline play ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/suuudokuuu-sudoku-puzzles/id6449440933/reviews.md ### 5/5 — Thank you *2026-08-07* Thank you for the great free game. I’m really enjoying it. When finishing a game, regardless of the difficulty level, the end screen says that it’s a “newbie” level **Developer response:** Thanks! Already fixed and will come in the next release! Any other feedback is highly appreciated ## Frequently asked questions about suuudokuuu ### What makes suuudokuuu's Hell difficulty unique? Hell difficulty in suuudokuuu uses a verified corpus of 49,158 genuine 17-clue puzzles, representing the hardest legitimate Sudoku puzzles that exist. This ensures a true challenge beyond typical 'expert' levels. ### Can I customize the look of suuudokuuu? Yes, suuudokuuu features a full theme engine allowing you to customize every cell, line, and highlight. It includes a live-preview theme editor and built-in contrast validation for readability in light and dark modes. ### How does Rival mode work in suuudokuuu? Rival mode allows you to send a specific puzzle to a friend via a share link, along with your recorded run. Your friend can then play the same grid and race against your recorded time. ### Does suuudokuuu have ads? No, suuudokuuu is completely free of advertisements. The description explicitly states 'No ads pretending to be puzzles, no accounts, no nonsense.' ### Can I play suuudokuuu offline? Yes, suuudokuuu works fully offline, meaning you do not need an internet connection to play puzzles. ### What devices is suuudokuuu available on? suuudokuuu is available on iPhone and iPad devices. ### How often is suuudokuuu updated? The latest version is 2.4.3, and the app was last updated on August 11, 2026. This indicates a recent update, suggesting ongoing development. ### What is the user sentiment for suuudokuuu? The app has a perfect rating of 5.0 stars from 1 rating, indicating very positive initial user sentiment. ## Version history (last 5 releases) ### 2.12.1 — 2026-09-04 Hints now teach instead of telling. Each one names the technique, lights up the cells that force the move, and walks you through the reasoning step by step before anything is placed. On phones the hint player now fills the space below the board as a fixed panel, so the text is bigger and nothing jumps between steps. • Undo and redo, with honest scoring: an undo hands back exactly the points its placement earned, so replaying the same cell can never pay twice. • Hints stay off Nightmare, Hell and Infinity unless you switch them on, and both hints and undo are hidden in Hardcore. • Daily challenge on its own tab: the same puzzle for everyone each day, with a current and best streak and your recent solves. • Difficulty now means what it says — every board is generated until it really needs the techniques its level promises. • Kinder to hands and eyes: bigger touch targets on the board and number pad, a reduce motion setting, larger digits, Calm play without a score, and full respect for your device text size. • New High contrast and Colorblind safe themes, with every board color pair checked against WCAG AA and states told apart by lightness and outlines instead of hue. • Full screen reader support: cells, digits and controls announce their role and state, and hint steps, mistakes and wins are spoken as they happen. • The Notes control now sits alone at the thumb edge, mirrored for left-handed play, and on desktop the hint panel finally has a readable size. • Fixed: moves built from several logical steps are credited to the technique behind them instead of counting as guesses, auto-candidates now drop what a hint eliminated, cells no longer keep the highlight or digit color of an earlier move, and the white digit on the selected cell is back. • Faster: the web version paints straight away instead of waiting for the whole download, and the app itself is 5.5 MB smaller. ### 2.8.0 — 2026-08-26 Infinity is here: 100 world-record Sudoku puzzles, rated SE 10.4 to 11.9. Arto Inkala's Everest and AI Escargot, Golden Nugget, Platinum Blonde, Kolk, Patience. Most people never finish one. • Every puzzle now shows its Sudoku Explainer rating on the 1.0 to 12.0 scale, in the level pill on the board, in history and on shared links. A built-in explainer tells you what the number means. • Hell has been re-curated: 1,544 verified 17-clue puzzles, every one rated SE 6.6 or higher. No more "hardest" boards that fall to simple singles. • Statistics, redesigned: your hardest solve, recent average difficulty and most played level, the full SE spectrum of everything you've finished, and your arsenal of techniques with usage counts. • History cards now carry a technique summary, and the replay screen is cleaner. • Full keyboard control on the web: arrows to move, digits to place, Space or N for pencil mode, Shift and a digit for candidates, A for auto-candidates. • Fixed: opening a shared link no longer clears your statistics. • Fixed: quitting a game now works in every language. • Faster: Hell games start instantly, and history loads without stalling. ### 2.6.0 — 2026-08-19 Infinity is here: 100 world-record Sudoku puzzles, rated SE 10.4 to 11.9. Arto Inkala's Everest and AI Escargot, Golden Nugget, Platinum Blonde, Kolk, Patience. Most people never finish one. • Every puzzle now shows its Sudoku Explainer rating on the 1.0 to 12.0 scale, in the level pill on the board, in history and on shared links. A built-in explainer tells you what the number means. • Hell has been re-curated: 1,544 verified 17-clue puzzles, every one rated SE 6.6 or higher. No more "hardest" boards that fall to simple singles. • Statistics, redesigned: your hardest solve, recent average difficulty and most played level, the full SE spectrum of everything you've finished, and your arsenal of techniques with usage counts. • History cards now carry a technique summary, and the replay screen is cleaner. • Full keyboard control on the web: arrows to move, digits to place, Space or N for pencil mode, Shift and a digit for candidates, A for auto-candidates. • Fixed: opening a shared link no longer clears your statistics. • Fixed: quitting a game now works in every language. • Faster: Hell games start instantly, and history loads without stalling. ### 2.4.3 — 2026-08-11 Hell difficulty is here — the hardest tier suuudokuuu has ever shipped. Every Hell puzzle is a hand-verified 17-clue grid, filtered so nothing that falls to simple singles slips through. Bring real technique. • Full theme engine: Classic, Gold and Newspaper presets, plus a custom editor with a live board preview. Contrast checks keep your colors readable in light and dark. • Better replays: share any moment of a game, and drag your way through the solution steps with the new scrubber. • Challenge mode: review a summary of your run before you share it, and "play again" keeps your full setup. • Confetti for every win. • Sharper layout on tablets and web. • Rare crash fixed, faster new games, and shared puzzles now score at their true difficulty. ### 2.0.0 — 2026-07-28 new liquid glass design! ## Apps similar to suuudokuuu | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sudoku Tales Refine](https://appshunter.io/ios/app/sudoku-tales-refine/id6547845536) | — | Free | Games | | [Sudoku: Puzzles for Relaxation](https://appshunter.io/ios/app/sudoku-puzzles-for-relaxation/id6737999563) | 5.0 (4) | Free | Games | | [True Sudoku – No Ads](https://appshunter.io/ios/app/true-sudoku-no-ads/id6749575075) | — | Free | Games | | [Sudoku: Daily Puzzle](https://appshunter.io/ios/app/sudoku-daily-puzzle/id6720758383) | — | Free | Games | | [Sudoku Tiny](https://appshunter.io/ios/app/sudoku-tiny/id6747923151) | — | Free | Games | | [Sudoku Numbers Game](https://appshunter.io/ios/app/sudoku-numbers-game/id6745200691) | — | Free | Games | --- *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 2026-09-09.*