Fill every cell so each row, each column, and each box contains every number once.
How to enter a number
Tap an empty cell. The narrator tells you what's there and what numbers are still possible. Then a keypad pops up — tap the number you want.
The four audio buttons
Read this Row reads everything in your selected cell's row. Read this Column does the same for the column. Read this Box reads the 3-cell or 9-cell box. What's Missing tells you which numbers are still missing from your selected row, column, and box.
Difficulty
Easy is 4×4 with numbers 1 to 4. Medium is 6×6 with numbers 1 to 6. Hard is the full 9×9. Start small and work up.
Hints and Reset
Hint places one correct number for you. Reset clears the board back to the starting position.