Sudoku - SLOX

Classic Sudoku with easy to expert difficulty. Auto-save, mistake checker, pencil notes, and clean dark mode. No sign-up, plays offline, multiple languages.

Sudoku - SLOX is a clean, ad-supported version of the classic 9x9 number puzzle.

Choose from easy to expert difficulty, place numbers 1 through 9 so that every row, column, and 3x3 box contains each digit exactly once. Built-in helpers keep you focused on the puzzle rather than the bookkeeping.

Features • Multiple difficulty levels (Easy / Medium / Hard / Expert) • Pencil notes for candidate numbers • Mistake checker and highlighting (toggleable) • Auto-save: resume your puzzle anytime • Personal best times per difficulty • Sound and haptic feedback (toggleable) • 7 languages (English, 한국어, 日本語, 中文, Español, Français, Deutsch) • Works fully offline, no account required

Whether you are warming up your brain in the morning or unwinding before sleep, Sudoku - SLOX is a calm, distraction-light way to enjoy the world's most beloved number puzzle.