Sudoku

Work through 100 classic Sudoku puzzles, ranging in difficulty from Easy to Master. Draw freely on the board to visualize your reasoning as you solve. No ads or in-app purchases.

Key Features:

Color cells and possible numbers, and draw lines between them to keep track of your reasoning right on the board

Find a challenge that suits you with difficulty ratings based on solving techniques. Built-in puzzles, puzzles you enter, and randomly generated puzzles all use the same standard

Have the game generate more puzzles at your chosen difficulty, with six levels from Easy to Grandmaster

Progress saves automatically, so you can take a break and pick up where you left off

Play entirely offline — no internet connection required

Use small numbers to mark what could go in each cell, or choose to have the game list them at the start or remove ruled-out possibilities as you fill in numbers

Highlight matching numbers across the board to make them easier to find and compare

Turn on optional warnings to spot repeated numbers in the same row, column, or 3×3 box

Undo a mistaken action, or restore an action you just undid

If you're unsure about a number you've entered, check whether it's correct, up to five times per puzzle

Play with mouse or keyboard, whichever feels more comfortable

Bring Sudoku puzzles you've found into the game by entering them by hand or pasting their text

Keep puzzles in your own groups, give them names and descriptions, and arrange them however you like

Write down your thoughts on each puzzle, and see your fastest time and how many times you've solved it

Copy a puzzle, or your current numbers and pencil marks, as text to send to others for discussion