Armchair Sudoku: Large Print

Armchair Sudoku is sudoku in large print: big, high contrast numbers in a typeface made for low vision, and buttons sized for a thumb. A new puzzle every day, five levels from Gentle to Fiendish, and hints that show you where to look and say why, in plain words.

No timer unless you ask for one, and no lives to run out of. Ads never interrupt a puzzle, and one purchase removes them.

PLAY THE PUZZLE FROM YOUR PAPER
Stuck on the sudoku in the newspaper or a puzzle book? Take a photo of it, or choose one you have already taken. Armchair Sudoku reads the numbers and shows you what it read, with any square it was unsure of marked, so you can check it against the page and fix anything it got wrong. Then play it here, with the same hints. The photo is read on your phone and is never sent anywhere.

EASY ON THE EYES
Numbers you can read at arm's length, set in Atkinson Hyperlegible, a typeface the Braille Institute made for people with low vision. The board grows with your phone's text size. Choose Paper, Night or High contrast colors. One box at a time shows a single box filling the screen, for a small phone or for eyes that would rather read nine big squares than eighty one small ones.

EASY ON THE HANDS
Pick a number once, then tap every square it goes in. Or turn it around and pick the square first. Undo as far back as you like. Mistakes are never counted against you and nothing ever ends a puzzle early.

HINTS THAT TEACH
A hint does not fill in a square for you. It names the reasoning, such as a hidden single, a pointing pair or an X wing, marks the squares that reasoning rests on, and leaves the number to you. Three hints a puzzle are included.

LEARN THE TECHNIQUES
How to solve explains the ten moves a sudoku can ask of you, in plain words, each shown on a real board. The two singles, which are all a Gentle puzzle ever needs, are open to everyone.

FIVE DIFFICULTIES, GRADED THE WAY PEOPLE SOLVE
Gentle, Steady, Tricky, Testing and Fiendish. Every puzzle the app makes has exactly one answer, can be solved by reasoning without guessing, and is graded by the techniques it needs.

A NEW PUZZLE EVERY DAY
The daily puzzle is the same for everyone, worked out from the date. A calendar shows the days you have done, with no streak to lose.

WORKS WITH SCREEN READERS
Every square is read out by row, column and box, along with what is in it, and every key and control is labeled.

YOUR PROGRESS STAYS ON YOUR PHONE
There is no account to make. Your games, settings and statistics are kept on this phone. Back everything up to a file, or export your solves as a spreadsheet. Several people can share one phone, each with their own settings and statistics.

WHERE ADS APPEAR, AND WHERE THEY NEVER DO
A small banner sits along the top of the screen, well away from the squares and the number buttons. A full screen ad can appear after you finish a puzzle, never in the middle of one, and never in your first few puzzles. If you want an extra hint, a day with a locked technique, a large print booklet or an hour with no ads at all, you can choose to watch a short ad for it. In the UK and Europe you are asked first whether ads may be personalized, and you can change your answer in Settings.

SUDOKU COMPLETE, ONE PAYMENT
Unlimited hints, the whole technique library, printable large print booklets with the answers at the back, a choice of app icon, and no ads. If ads are all you want gone, Remove Ads does just that for less. Both are one payment, not a subscription.

Questions or ideas: armchairsudoku@pikeworks.co.uk