Sudoku

Unleash your logical thinking with Sudoku, an elegant, completely ad-free brain puzzle built from ground up for Android. Whether beginner looking to relax or expert seeking serious mental challenge, procedurally generated boards provide endless high-quality gameplay. Procedural, Solvable Puzzles Forget repetitive fixed puzzle catalogs. Advanced generator creates polished, unlimited Sudoku boards across four difficulty levels: Easy, Medium, Hard, and Expert. Every board is dynamically validated to ensure exactly one unique solution. Rich, Flexible Controls Enjoy fluid, modern controls based on your preferred play style. Switch between cell-first and number-first input modes. Use automatic pencil notes, manual notes, eraser, unlimited undo and redo, and smart hints that prioritize naked singles. Board highlighting helps identify rows, columns, 3x3 boxes, matching numbers, and duplicate conflicts. Endless Game Progression Complete a unique Daily Challenge every day and track progress using visual completion calendar. Create custom puzzles by entering board string or puzzle layout. Engine validates formatting, solvability, and solution uniqueness before starting game. Review detailed statistics and history, including total games, win rate, winning streaks, average completion times, and difficulty-based performance. Filter and review complete saved game history. Stunning Theme Options Customize app appearance using Classic light theme, Midnight dark theme, or system-adaptive mode. Enjoy dynamic accent colors, soft panel lines, and automatic system-bar brightness matching. Truly Accessible Sudoku includes full TalkBack support and descriptive screen content. Text scales without overflowing. All interactive controls use touch targets of at least 48dp. App supports portrait and landscape orientations. Non-color conflict underline option helps color-blind players identify mistakes without relying only on color.