Experience challenging Sudoku puzzles with customizable themes and a unique Hell difficulty level. Compete with friends in a rival mode and replay your games with detailed scoring. This app offers a pure, ad-free puzzle experience.
2.4.3
August 11, 2026
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.
MoreThanks! Already fixed and will come in the next release! Any other feedback is highly appreciated
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.
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.
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.
No, suuudokuuu is completely free of advertisements. The description explicitly states 'No ads pretending to be puzzles, no accounts, no nonsense.'
Yes, suuudokuuu works fully offline, meaning you do not need an internet connection to play puzzles.
suuudokuuu is available on iPhone and iPad devices.
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.
The app has a perfect rating of 5.0 stars from 1 rating, indicating very positive initial user sentiment.
