Andoku Sudoku 2+

Andoku Sudoku 2+ is an ad-free Sudoku app from Markus Wiederkehr. It is built for players who want a deep library of number puzzles rather than a flashy casual game. The listing promises 10 Sudoku variations, 8 difficulty levels, more than 15,000 puzzles, unique solutions, no guessing required, autosave, pencil marks, several input modes, unlimited undo and redo, portrait and landscape support, phone and tablet support, and configurable assistance.

The public signals are excellent for a smaller premium-style puzzle app. This snapshot shows more than 10,000 installs, a 4.952 rating, 819 ratings, and 74 written reviews. The install count is modest compared with mass-market Sudoku apps, but the rating is extremely high. The update date, May 22, 2024, is older than some entries but still not ancient for a stable offline logic app. Readers should check current compatibility, but the feature set looks mature.

The strongest selling point is the puzzle library. More than 15,000 Sudoku puzzles is a huge amount of content, especially when paired with 8 difficulty levels. A player who enjoys Sudoku regularly could use this app for years. The listing also says every puzzle has a unique solution that can be discovered without guessing. That is one of the most important claims a Sudoku app can make. Serious Sudoku players want logical solve paths, not puzzles that require trial-and-error.

The 10 variations make Andoku Sudoku 2+ more flexible than a standard Sudoku app. It includes Standard Sudoku, X Sudoku, Hyper Sudoku, Percent Sudoku, Color Sudoku, Squiggly Sudoku, and combinations such as Squiggly X, Squiggly Hyper, Squiggly Percent, and Squiggly Color. These variants change the solving rules and pattern recognition. For experienced players, this variety can keep Sudoku fresh. For beginners, it may be better to start with standard puzzles before exploring the more complex rule sets.

The ad-free positioning is a major advantage. The listing says this version is totally ad-free and includes a new set of puzzles, while an ad-supported free version is also available. That is clear and user-friendly. Sudoku is a concentration-heavy activity, and ads can disrupt solving flow. An ad-free version is especially appealing for players who solve longer or harder puzzles and do not want interruptions.

The assistance options are well chosen. Automatic error checking can help players catch mistakes early. Automatic pencil mark removal can keep notes clean. Highlighting can reveal patterns. The key is configurability: the app can offer as much or as little assistance as desired. That matters because Sudoku players have different preferences. Some want a strict paper-like experience, while others want digital tools that reduce busywork.

Pencil marks and unlimited undo/redo are essential for deeper Sudoku. Pencil marks let players track candidates, and undo/redo supports exploration without fear. Several input modes are also important because Sudoku input style is personal. A good app should support digit-first and cell-first workflows or similar options. The listing does not detail each mode, but it clearly recognizes that input flexibility matters.

Portrait and landscape support, plus phone and tablet support, are practical strengths. Sudoku grids can be comfortable on phones, but tablets offer more space for candidates and variant markings. Landscape support may help some players use larger controls or different layouts. The catalogue records 8 screenshots, enough for a basic interface check. Readers should look for candidate readability, clear highlighting, and uncluttered controls.

Compared with genina.com's Sudoku, Andoku Sudoku 2+ has a smaller install base but a stronger focus on variants and ad-free premium play. Compared with Math Cross, it is less arithmetic and more pure constraint logic. Compared with brain-training collections, it offers one deep puzzle family rather than many shallow exercises. It is best for players who already like Sudoku or want to grow into harder variants.

The main caveat is that the app may feel serious rather than playful. It does not advertise daily events, avatars, or social features. That is a strength for purists and a weakness for users who need external rewards. My verdict is strongly positive. Andoku Sudoku 2+ has a huge puzzle library, excellent rating, meaningful variants, logical-solution claims, ad-free design, and robust solving tools. It is one of the more credible Sudoku-focused apps in the catalogue.