A standalone app from Neurantra

Alphadoku

Nine letters. One hidden line.

Sudoku with a word to discover. Fill each row, column, and box with nine unique letters, then find the one hidden line that spells the target in order.

Choose Easy, Medium, Hard, or Pro. Learn through interactive practice, use pencil marks and hints, and save an unfinished puzzle to return to later.

A standalone letter Sudoku app for iOS and Android.

A separate download from Puzzlecub.