Sudoku - Classic & Killer

New daily challenges keep your brain sharp. Sudoku - Classic Number Games offers Classic, Killer, and Expert modes with five difficulty levels (Easy, Medium, Hard, Expert, Master). With over 10,000 handcrafted puzzles and weekly additions, plus daily challenges and monthly trophies, you can train your logic anytime, anywhere—offline.

Smart tools and a calm design help you improve faster: pencil notes, auto-notes and auto-check, explanatory hints that teach technique, highlight duplicates, and unlimited undo/redo. A clean, minimalist interface with light/dark themes, customizable number size, and distraction-free gameplay makes progress tracking and personal-best times feel rewarding.