Sudoku by WizusLabs

The classic number puzzle, reimagined. Sudoku by WizusLabs brings you three sudoku variants with six difficulty levels — from Easy to Grandmaster — all playable offline with no account required. Three ways to play: CLASSIC SUDOKU The timeless 9x9 grid. Fill every row, column, and 3x3 box with digits 1-9. Six difficulty levels from relaxing Easy puzzles to mind-bending Grandmaster challenges with just 22 given cells. IRREGULAR SUDOKU Same rules, different regions. Twenty handcrafted templates replace the standard 3x3 boxes with irregular shapes, creating fresh challenges that demand new strategies. KILLER SUDOKU Cage sums meet sudoku logic. Each dashed cage shows a target sum — use arithmetic and elimination together to solve puzzles that combine the best of sudoku and kakuro. Features that keep you coming back: - Daily Challenge — A new puzzle every day. Build a streak with a forgiving grace window that rewards consistency without punishing the occasional missed day. - Monthly Trophy Wall — A calendar view of every puzzle you have completed. Watch your month fill up. - Technique Trainer — Learn solving strategies step by step. Nine guided exercises teach Naked Singles, Hidden Singles, and Naked Pairs. - Smart Hints — Tiered hints that teach, not just tell. Level 1 names the technique; Level 2 reveals the answer. Advanced players can tackle X-Wing, Swordfish, and XY-Wing patterns. - Auto-Notes — Toggle automatic candidate population to speed up advanced play. - Multi-Color Candidates — Long-press notes to color-tag candidates for chain analysis. - Pencil Notes & Undo — Full note-taking and unlimited undo for thoughtful solving. - Shareable Solve Card — Finished a tough puzzle? Share a branded result card with your time and difficulty. - Dark Mode — Follows your system setting for comfortable play day or night. - Accessibility — Colorblind-friendly themes (deuteranopia, tritanopia, monochrome) and adjustable font scale. - Tablet Layout — Optimized side-by-side layout on iPad. Six difficulty levels: Easy, Medium, Hard, Expert, Master, and Grandmaster. Every puzzle has exactly one solution. Built for your life: - Offline-first. No internet connection required. - No account needed. Your progress stays on your device. - Auto-save. Close the app and resume right where you left off. Three ways to enjoy: - Free — All puzzles, all difficulties, all game modes. Ads between sessions. - Sudoku Pro Yearly ($2.99/year auto-renewable) — Remove all ads, unlimited hints. Cancel anytime. - Sudoku Pro Lifetime ($9.99 one-time) — Same benefits, one payment, never expires. A calm, focused puzzle experience. No timers pressuring you. No pay walls blocking puzzles. Just you and the grid. Privacy policy: https://wizuslabs.com/sudoku/privacy-policy Terms of Use (EULA): https://wizuslabs.com/sudoku/terms-of-use