Sudoku: Daily Teaser

Sudoku is a calm, focused puzzle app built for daily play. Generate fresh Sudoku boards across multiple difficulty levels, track your progress, and build a daily solving streak over time. Your puzzles are saved automatically, so you can start a board, step away, and return whenever you are ready. The app includes a clean puzzle interface with notes, undo, mistake tracking, peer highlighting, elapsed time, and progress history. A simple dashboard shows your active and completed puzzles, daily streak, and recent completion heatmap. Everything is stored locally on your device. No accounts, no ads, no tracking, and no cloud sync. Features: Fresh Sudoku puzzles Easy, Medium, Hard, and Expert difficulty levels Automatic puzzle saving Notes mode Undo and erase tools Mistake limit setting Daily streak tracking Completion heatmap Personalized greeting Light, dark, and system appearance options Local-first privacy