Sudoku You

A fully offline Sudoku game featuring step-by-step logical hints, advanced notation, and multi-format import/export functionality.

Sudoku You is a free, open-source Sudoku application specifically designed for offline play and serious puzzle-solving. On your device, you can generate classic 9×9 puzzles, continue your previously saved game sessions, or import custom puzzles from text files. All puzzles generated by the app have a unique solution and offer four difficulty levels: Easy, Medium, Hard, and Brutal; imported puzzles also undergo format validation and uniqueness checks.

When assistance is needed, the built-in human-like problem-solving tool provides a step-by-step logical walkthrough, textual explanations, and grid markings. It covers both basic techniques and advanced techniques such as number sets, fish patterns, wings, coloring, chains, unique rectangles, and forced chains. The optional error-checking feature can also identify incorrect numbers or missing candidate numbers before allowing the solver to proceed with further reasoning.

function: • Candidate list, Auto-fill candidate list, Undo/Redo and Restart • Advanced Annotation: Color grid cells or candidate cells, highlight dual-candidate cells, select grid cells by clicking and dragging, or draw solid or dashed links. • Import puzzles in Susser, multi-line text, Pencil Candidate Grid, Sukaku, Excel/TSV, OpenSudoku, or HoDoKu formats; export the original puzzle or the current grid. • Automatic saving for both in-progress and completed games • Aggregate game playtime, best/average completion times, and the number of games started and completed, categorized by difficulty level. • Material 3 Interface: System/Light/Dark Mode, Dynamic Wallpaper Color Scheme, Custom Accent Color, Multiple Color Palettes, AMOLED True Black, and Screen Highlight Option • Supports English and Simplified Chinese, with the ability to switch languages independently of the system language. • View local crash history and third-party open-source license information

conceal: Sudoku You does not request any network permissions, nor does it contain any advertising, account-related, analytics, or tracking features. The game and settings are stored locally. Crash reports are retained locally for up to 30 days and will never be uploaded automatically; whether to copy or share them is entirely up to you.

Sudoku You is licensed under the GNU GPL v3.0 or later; it requires Android 12 or a later version.