Sudoku. Simple & Elegant.

Welcome to Sudoku. 2.0 — the biggest update we've ever made. This isn't just an update. It's a complete reimagining of what a Sudoku app can be. Sudoku. is now a full coaching platform designed to take you from beginner to grandmaster. What's new: • 41 Solving Techniques — from Naked Singles to X-Chains, every technique explained and interactive • Technique Library — browse, learn, and practice each technique with real solver-derived examples • Campaign Mode — 50 progressive levels across 5 worlds of increasing difficulty • Smart Hints — hints now explain the technique behind each step, not just the answer • Chain Drawing — draw chains directly on the grid to visualize complex solving logic • Cloud Sync — your campaign progress and technique mastery sync across all your devices • Inline Candidates — see all possible values displayed directly in cells • Customizable Colors — personalize cell highlights and pencil mark colors Every hint teaches. Every level builds on the last. Every technique you master opens the door to the next. Thank you for playing Sudoku. We read every review — your feedback shaped this update. Accessibility improvements, bug fixes and stability improvements.