Sudoku Book & Game – Offline

A Sudoku game that plays like a real puzzle book. Every page is checked to have exactly one solution, its difficulty set by the techniques it needs — not by counting clues. Everything is on your phone: play offline, anywhere, with no account and no internet.

📖 A PUZZLE BOOK ON YOUR PHONE
• 500 Sudoku puzzles, all free: six books (Beginner, Easy, Medium, Hard, Expert and Sudoku-X, diagonal Sudoku) plus Volume II with 200 more from easy to expert
• A new free daily Sudoku every day — gentle on Monday, tough on Sunday. No streaks, no pressure: miss a day and it waits for you
• Pages fill with stamps as you solve them: the date, your time, and "no hints" when you did it alone
• Your library shows how far you are in every book and takes you back to your page in one tap

💡 HINTS THAT TEACH, NOT JUST TELL
Stuck? A hint shows you where to look first, then which technique works there, then why — and only gives the answer if you ask. You learn real Sudoku techniques: hidden singles, naked pairs, pointing pairs, X-Wing, Swordfish and more.
• Check my notes: finds a pencil mark that removed a number you still need, without spoiling anything
• Rewind: "Your board was correct 6 moves ago — go back there?"
• After each puzzle: a short summary of the techniques you used and the key step

🔍 LARGE PRINT AND EASY ON THE EYES
• Large print mode: bigger numbers, bolder lines, notes only on the cell you're working on
• Text size options and a reading-friendly font
• Eleven looks, from a classic newspaper page to a dark library, chalkboard and e-ink
• Numbers, Roman numerals, letters, Arabic numerals, shapes or colours

✏️ FAST, COMFORTABLE INPUT
• Pencil marks (notes), fill all notes, and notes that clean themselves when you place a number
• Number-first input: tap a digit, then every cell where it goes
• Drag across cells to note several at once; long-press a number for a quick note
• Undo and redo, kept even after you close the app
• Mistakes your way: highlight numbers that break the rules, check answers, or play Game Mode with three strikes
• Keyboard support on tablets and Chromebooks

🖨️ SHARE, PRINT AND SCAN
• Print a puzzle, its solution or both, or share it as a picture or PDF
• Every puzzle has a short code — send it to a friend and they get the same puzzle
• Scan a Sudoku from a newspaper or book with your camera and solve it in the app

🔒 PRIVATE AND OFFLINE
No account, no sign-in. Your progress stays on your phone and every move is saved the moment you make it.

Whether you're learning Sudoku for the first time, keeping your brain sharp with a daily puzzle, or hunting for an X-Wing in an expert grid, Sudoku Book is a calm, honest number puzzle for every level.