Expert Sudoku Book Stress Free Downloads & RevenueExpert Sudoku Book Stress Free · App Store
Not in any tracked top chart right now.
Updated 2 Nov 2026 · rankings refresh through the day
DeveloperBoy Howdy Technology LLC
CategoryGames
PriceFree
Released
Rating★ 4.8 (1.7k)
Version1.46
Age rating4+
First seen by us
12 Oct 2026
12 Oct 2026Installs (est.)50k+ worldwide
Expert Sudoku Book Stress Free update history & changes
Last change · 3 events since 12 Dec 2015Full timeline ↓Full timeline · 3 events
- 🆕Expert Sudoku Book Stress Free first spotted by AppInsiderUnited States (found via search)
- 📦Expert Sudoku Book Stress Free version 1.46• Updated for the latest iOS
Thanks for playing!
Search for "Boy Howdy Technology" to see all our free games! - 🆕Expert Sudoku Book Stress Free released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.8 ★
1.7k ratings
Measured
Expert Sudoku Book Stress Free on the App Store
App details
App ID
1056202953
Publisher
Boy Howdy Technology LLC
On the store since
Dec 2015
10 years on the store
Minimum OS
iOS 12.0+
iPhone 5s and later
Devices
iPhone · iPad
Universal purchase · Game Center
Content rating
4+
Languages
1
EN
Size
67 MB
Also listed in
Strategy, Education, Trivia
Expert Sudoku Book Stress Free downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: Ad-led
How Expert Sudoku Book Stress Free makes money: subscriptions, one-off purchases and ads.
Ads · 6 ad networks
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.8 ★
1.7k ratings
Measured
Ratings
1.7k
Measured
About 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
• 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
Latest updates
1.46
• Updated for the latest iOS
Thanks for playing!
Search for "Boy Howdy Technology" to see all our free games!
