# Expert Sudoku Book Stress Free — Samurai Hyper Jigsaw Cross X > Extensive collection of free Sudoku puzzles with multiple variations and difficulty levels. (iPhone/iPad app by Boy Howdy Technology LLC.) - Source: https://appshunter.io/ios/app/expert-sudoku-book-stress-free/id1056202953 (this page in markdown: same URL + `.md`) - Developer: [Boy Howdy Technology LLC](https://appshunter.io/developer/293910537) - Category: Games, Education, Strategy, Trivia - Price: Free - Rating: 4.80/5 from 1,675 App Store ratings · 62 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 64 MB - Languages: American English - Released: 2015-12-12 - Data updated: 2026-09-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/expert-sudoku-book-stress-free/id1056202953/reviews.md ## What is Expert Sudoku Book Stress Free? • 160,000 Sudoku Puzzles, with 4 difficulty levels! • 100% FREE! DOWNLOAD NOW AND START HAVING FUN! :-) • No timers at all! Just relax and have fun! Boy Howdy's Expert Sudoku has four tricky types of Sudokus to try: • X Sudoku is the same as regular 9x9 sudoku, but both diagonals must contain 1 to 9 once only. • Hyper Sudoku is 9x9 but with an additional set of four 3x3 blocks that must contain 1 to 9 once only. • Jigsaw Sudoku is 9x9 but instead of 3x3 smaller blocks, the blocks are shaped like jigsaw pieces. • Samurai Sudoku (iPad only, because it's HUGE!) is a super combo of five regular 9x9 sudoku puzzles, overlapping on one corner of one of the 3x3 blocks. Note that the normal row/column constraints are only within each 9x9 square. • There are 40,000 Sudokus for each of the four types! (10,000 Easy, 10,000 Medium, 10,000 Hard, and 10,000 Evil Sudokus) • Beautiful, easy to read numbers! • Full UNDO support! • Fast and intuitive dual-keypad input system - just tap a cell and easily mark your answer or pencil marks! • Pencil marks are auto-erased as you enter answers! (Can be turned off if you wish) • Horizontal and Vertical guidelines make it easy to look at your current row and column (Can be turned off if you wish) • Auto-highlight other cells with the same number as the currently selected cell • Auto-highlight cells that have a visible conflict • Auto-highlight pencil marks that have a visible conflict (All of these highlights can be disabled if you wish) • Hint function if you get stuck! • Check your work function, to spot any problems you've got if you're unsure! • Your progress is automatically saved, all the time, so go ahead and take that call or jump out to any other apps - you can come back and pick up playing right where you left off! • Sounds can be disabled if you want a quiet game • You can even listen to your own music while you play Thanks for playing! Come see us at http://boyhowdytechnology.com ## Key features - 160,000+ Sudoku puzzles - Four difficulty levels - X Sudoku - Hyper Sudoku - Jigsaw Sudoku - Samurai Sudoku (iPad only) - No timers ## What do users think of Expert Sudoku Book Stress Free? Overall sentiment: positive **Pros** - 👍 Awesome, challenging, great support - 🧠 Keeps the brain active - 🎮 Fun and engaging game - 🧩 Variety of game modes and layouts - 🤖 Puzzles challenging even for experts **Cons** - 🐛 Occasional glitches and bugs - 🤖 Puzzles too easy at highest difficulty - 🔕 Lack of customization options - 🔕 Missing features like statistics and timer **Commonly reported bugs** - Numbers jumping to wrong squares - App pausing unexpectedly - Inability to delete app from device **Most requested features** - Add undo/redo functionality - Provide more challenging puzzles - Include game statistics and progress tracking - Allow customization of UI elements ## Recent user reviews (10 of 62) All indexed reviews: https://appshunter.io/ios/app/expert-sudoku-book-stress-free/id1056202953/reviews.md ### 5/5 — Boy Howdy Sudoku *2026-06-25* Boy Howdy has the best selection of Sudoku. I’ve tried lots of other brands but Boy Howdy is the best. I like that it shows the errors right away. NO ADDS is a bonus. The rest of Boy Howdy games are fun to play I’ve played other brands but I always come back to Boy Howdy. The Fit-In word puzzles are fun too ### 5/5 — Expert Sudoku Game *2026-05-10* This game is really fun. You can play without assistance or you can use options to mark tile squares so you can keep track. It has improved my skill at Sudoku. There is even a way to see if you have made a mistake! That takes the pressure off. There are days I just want to play and not work too hard. It’s satisfying played like that, too. ### 5/5 — Great brain game, love it. *2026-03-06, version 1.44* It’s entertaining and a challenge, love playing it!! ### 3/5 — Hard to use app and impossible to delete *2025-09-24* I don’t usually leave reviews for apps I dislike, but this one will not allow me to delete from App Library, only from Home Screen. So just beware before downloading it and getting stuck with it. **Developer response:** Howdy! To delete an app: Touch and hold the app in App Library, tap Delete App, then tap Delete. Here are Apple's instructions, if you need more detailed information https://support.apple.com/guide/iphone/remove-or-delete-apps-iph248b543ca/ios ### 5/5 — Awesome Sudoku *2025-08-29, version 1.35* My name is Isaac and I love this gam!!!!!! ### 5/5 — Cool game. *2025-03-06* This is a really great game. There are several levels and everyone can find a challenge. ### 5/5 — Boy howdy *2025-02-19, version 1.33* Awesome, challenging, great support etc etc !!!! Thank you !!!! ### 5/5 — X sudoku *2024-11-06* It is quite fun, a bit different from traditional sudoku! ### 5/5 — I’m hooked. *2024-10-18, version 1.33* Really great to play. It still stumps me sometimes, but I enjoy the challenge ### 3/5 — QoL improvement please *2024-06-20* I didn't play much because I didn't like having to always click a box then click a number and repeat. I would like to be able to hold that number and click on the boxes all at once. Thanks! ## Frequently asked questions about Expert Sudoku Book Stress Free ### What types of Sudoku puzzles are available? The app features four unique Sudoku variations: X Sudoku, where diagonals must also contain numbers 1-9; Hyper Sudoku, with additional 3x3 blocks; Jigsaw Sudoku, using irregularly shaped blocks; and Samurai Sudoku, a large combo of five overlapping puzzles (iPad only). Each type has 40,000 puzzles across four difficulty levels. ### Is this app free to play? Yes, the app is 100% FREE to download and play. It offers a vast collection of puzzles without any cost to the user. ### What are the key features for a relaxing gameplay experience? The app emphasizes a stress-free experience with no timers. It includes full undo support, an intuitive dual-keypad input system with auto-erasing pencil marks, and optional auto-highlighting for numbers, conflicts, and pencil marks. Sounds can also be disabled for a quiet game. ### What are the difficulty levels and how many puzzles are there? There are four difficulty levels: Easy, Medium, Hard, and Evil. For each of the four Sudoku types (X, Hyper, Jigsaw, Samurai), there are 10,000 puzzles per difficulty level, totaling 40,000 puzzles for each type and over 160,000 puzzles in total. ### Can I save my progress and use other apps while playing? Yes, your progress is automatically saved at all times. You can freely switch to other apps or take calls, and then return to pick up exactly where you left off in your Sudoku puzzle. ## Version history (last 5 releases) ### 1.46 — 2026-06-03 • Updated for the latest iOS Thanks for playing! Search for "Boy Howdy Technology" to see all our free games! ### 1.45 — 2026-05-22 • Updated for the latest iOS Thanks for playing! Search for "Boy Howdy Technology" to see all our free games! ### 1.44 — 2026-02-05 • Updated for the latest iOS Thanks for playing! Search for "Boy Howdy Technology" to see all our free games! ### 1.43 — 2026-01-28 • Updated for the latest iOS Thanks for playing! Search for "Boy Howdy Technology" to see all our free games! ### 1.42 — 2026-01-07 • Updated for the latest iOS Thanks for playing! Search for "Boy Howdy Technology" to see all our free games! ## Apps similar to Expert Sudoku Book Stress Free | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sudoku Mega Bundle](https://appshunter.io/ios/app/sudoku-mega-bundle/id970674839) | 4.8 (2,874) | Free | Games | | [Sudoku Quest - Puzzle Games](https://appshunter.io/ios/app/sudoku-quest-puzzle-games/id671755288) | 4.7 (1,852) | Free | Games | | [Stress Free Sudoku Game Book!](https://appshunter.io/ios/app/stress-free-sudoku-game-book/id640720527) | 4.8 (10,367) | Free | Games | | [Sudoku Joy: Number Master Game](https://appshunter.io/ios/app/sudoku-joy-number-master-game/id1460985516) | 4.9 (738) | Free | Games | | [Sudoku ∙](https://appshunter.io/ios/app/sudoku/id727577974) | 4.7 (1,434) | Free | Games | | [Flex Sudoku](https://appshunter.io/ios/app/flex-sudoku/id1643590351) | 3.4 (7) | Free | Games | ## More apps by Boy Howdy Technology LLC - [Jewel Beach](https://appshunter.io/ios/app/jewel-beach/id382524862) - [Bubble Jewels™](https://appshunter.io/ios/app/bubble-jewels/id407262916) - [Word Jewels® Classic](https://appshunter.io/ios/app/word-jewels-classic/id433238748) - [Word Jewels® Classic XL](https://appshunter.io/ios/app/word-jewels-classic-xl/id437516617) - [Stress Free Hangman 44k](https://appshunter.io/ios/app/stress-free-hangman-44k/id492731157) - [Poker Jewels™ Las Vegas Tycoon](https://appshunter.io/ios/app/poker-jewels-las-vegas-tycoon/id505578745) All apps by Boy Howdy Technology LLC: https://appshunter.io/developer/293910537 ## Related topics [expert sudoku](https://appshunter.io/ios/topics/expert-sudoku) · [expert sudoku book stress free](https://appshunter.io/ios/topics/expert-sudoku-book-stress-free) · [jenius](https://appshunter.io/ios/topics/jenius) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*