Large print Wordoku: Sudoku with letters
Wordoku follows the rules of Sudoku exactly, but swaps the numbers for letters. The 9 by 9 grid uses nine different letters and the 6 by 6 grid uses six. Every row, every column and every box must hold each letter once, so anyone who can solve a Sudoku can solve a Wordoku. There is no arithmetic anywhere, only careful looking, and letters can feel fresher than numbers when you have done a great many Sudoku.
The letters are drawn big and bold in Atkinson Hyperlegible, a typeface created by the Braille Institute so that look-alike characters are easy to tell apart. You can enlarge everything with the text size buttons and choose from three colour themes: Morning edition, Evening edition and High contrast. Buttons are at least 44 pixels square, and a tap that lands a little outside a square still chooses the nearest one.
A word hidden in every puzzle
In each puzzle the letters spell a word. On the 9 by 9 grid it is a nine-letter word such as PLAYHOUSE or BIRTHDAYS, and on the 6 by 6 grid a six-letter word such as GARDEN or BASKET. The letter pad shows the letters in the order of the word, and when the puzzle is finished the top row reads the word from left to right. The word changes from puzzle to puzzle, and it is a gentle extra clue: once you can guess it, the top row starts to fill itself in.
Two sizes, three levels
The 9 by 9 grid is the full-size puzzle. The 6 by 6 grid has boxes two squares tall and three wide, and is a gentler place to begin or a quicker break. Each size comes in three levels. Easy and Medium can always be finished by spotting the one square where a letter fits, or the one letter a square can hold. Hard needs a little more, such as a naked pair. The free Wordoku each day is the 9 by 9 Easy, and members will be able to play both sizes at every level.
Hints, undo and saving
If you are stuck, press Hint. The first press highlights a row, column or box where a move is waiting, and a second press fills the letter in. Hints only change the stars you earn: three stars for none, two for one or two, and one for three or more. The time you take never lowers your stars, the timer counts up rather than down, and Zen Mode hides it.
Undo is always one press away, and your progress is saved on your own device after every move. Free players keep it on their own device; members will be able to play unlimited puzzles every day, and their scores and history on every device. If you would like the classic numbers instead, try large print Sudoku.