Sudoku & Variants by Logic Wiz
April 23, 2025
More About Sudoku & Variants by Logic Wiz
Enjoy the classic Sudoku puzzle, and explore over 35 exciting Sudoku variants that introduce new rules and strategies. Each variant offers a fresh logic twist—like Killer Sudoku, Diagonal Sudoku, Sandwich Sudoku, Arrow Sudoku and many more—to keep your brain engaged and thinking differently.
Take on our Themed Weekly Challenges, where curated puzzle sets revolve around fun, creative topics to keep things fresh and engaging week after week.
🧩 Features:
• Play a wide variety of puzzles for free
• Classic Sudoku puzzles for all skill levels
• Over 35 unique Sudoku variants to explore
• Thousands of carefully handcrafted puzzles for a high-quality solving experience
• Unique logic puzzles that train different parts of the brain
• Themed Weekly Challenges with creative puzzle sets
• Smart hints and strategy explanations—no guessing required
• Beautiful, minimal design for focused play
• Six difficulty levels, from Beginner to Master
• Perfect for daily brain training and relaxation
• New variants and boards are added occasionally
The Variants:
Classic Sudoku, Killer Sudoku, Sandwich Sudoku, Jigsaw (Irregular) Sudoku, Thermo, Diagonal, Arrow, Windoku, Skyscraper, Zipper Line, X-Sum, Little Unique Killer, Consecutive, Non-consecutive, Palindrome, Kropki, German Whisper, Dutch Whisper, Chess Knight, Chess King, Bishop, Greater-than, XV, Reflection, Quadruple, Slingshot, Slow Thermo, Even Odd, Between Lines, Lockout lines, Running Cells, Ascending Series, Renban, Universal, Couples, Twisted Consecutive
Additional Game Features:
• Multiple variants on a single board
• Unique solution to each puzzle
• All boards designed and created by Logic-Wiz
• Gallery game view
• Play multiple quests & games concurrently
• Cloud Sync - Synchronize your progress over multiple devices
• Keep Screen Awake
• Light and Dark Theme
• Sticky digit mode
• Filter by your favorite variants
• Remaining cells of a digit
• Select multiple cells at once
• Select multiple cells at distributed locations of the board
• Multiple pencil marks styles
• Double notation
• Auto remove pencil marks
• Highlight matching digits and pencil marks
• Multiple error modes
• Performance tracking for each puzzle
• Statistics and Accomplishments
• Unlimited Undo/Redo
• Various cell marking options – highlights and symbols
• Combinations Panel for Killer and Sandwich boards
• Track and improve solving time
• Board preview
• Easy resumption of unfinished boards
• Mobile Phones and Tablets
Inspired by the world of Cracking the Cryptic and other advanced puzzle communities, Sudoku & Variants by Logic Wiz is ideal for solvers who love clever twists and deep logic without the need to guess.
Whether you're looking for a relaxing mind game or a challenging strategy puzzle, this free Sudoku app is your go-to for logic fun.
Latest Version
3.1.4
April 23, 2025
Logic-Wiz
Puzzle
Android
746,406
Free
com.uvmlab.usudoku
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User Reviews
Ender Schiotz
1 year ago
I really enjoy this game. There are a lot of different variants that keep me coming back to it over other puzzle games. It never leaves me feeling bored. I can always choose something different if I don't like or am bored of a particular variant. I also find it really cool that you can put in your own Sudokus to solve them in the app, like from books and other sources.
Sam Martinez
1 year ago
Out of all of the sudoku apps I've used, this is by far the best one. The tools are easy to use and make sense, the touch and slide functions to select cells is easy to use, the puzzles are fun, challenging, and logically beautiful, and the weekly additional puzzles are a very nice touch to have a theme along with consistent new content.
Colten Freeman
1 year ago
A genuinely good sudoku app. It has hundreds of puzzles for each level of difficulty (and although there are 6 difficulties, most puzzles never feel like they're in the wrong difficulty category which I find impressive), every variant is well demonstrated, fun, and unique, and the ads rarely interrupt gameplay (they usually only show if you spend <30 minutes on a singular puzzle... and at that point, it feels like a reminder to take a break). Two thumbs up from me!
Ann Ouyang
1 year ago
There are a lot of different variants (especially if you buy the premium) and it's fun to try all the different combinations! In the non-premium version, the ads make it a little unstable. The hints are helpful probably 90% of the time (occasionally they are too advanced for me to follow!)
Dave Butler (thehumordoc)
1 year ago
Crashes frequently. Has *lots* of ads. You can pay to remove them, but $20 seems steep for an app that crashes at least once per puzzle. Edit: Start a puzzle - ad. Finish a puzzle - ad. Take too long on a puzzle - ad. Pause too long on a puzzle - ad. This is by far the most ads I've ever seen for a sudoku game, and I've already moved on to an ad free game.
Sam Rudnick
2 years ago
Overall one of the better apps. Sadly the ads keep causing issues. When on the second screen of an ad and you miss the x, and then proceed to go back to the app and hit the x correctly, the game appears to immediately crash. You're left opening the app again, finding the puzzle you wanted, and hoping you don't miss this time.
Blanket
1 year ago
Best sudoku app on the market. I have tried a lot that feature unsolvable puzzles, very easy difficulty, and/or lack of QOL features. This app satisfies all of those needs, and there are more than enough varants and number of puzzles to keep engaged for a long time. The ads are a minimal disturbance and a small trade off for the quality of the app.
Garry Scott
8 months ago
I am enjoying the world of variants! I loaded it just to be able to learn sandwiches on easy. Once I got the principles, then it was challenging fun. As I tried the other kinds of variants, I became hooked. Try it! It's so much fun! You can color squares with multiple colors for your deduction processes, select more than one box to make pencil marks. Use a cage calculator to keep track of possible combinations of numbers. There are multiple skill levels. I will pay for extra variant types.
Nohl Lyons
11 months ago
This app is so good, and yet the ads and the promotion process is so horrible that it is ruining my experience. At first there was an ad here and there such as inbetween levels. That's seemed fair. Then one day you get an offer to go without ads for about $13. But you don't get to think about it and you don't get another chance to change your mind. After that, you get two ads between levels and you have to watch ads to get extra features that were free a minute ago. Each ad is 30 seconds.
PsychoPiper
6 months ago
It doesn't get much better than this, especially for a free app. Tons and tons of puzzles, with a huge variety of variants and difficulties. Far fewer ads than most free puzzle games. Option for a permanent premium instead of just being subscription only. This is THE sudoku app, I'll be going premium soon. My only complaint is that the ads don't always appear when they're supposed to, forcing me to restart the app. Thankfully, my progress is never lost, but it is a bit annoying at times. 9.5/10
Jason Storer
2 years ago
The sudoku gameplay is excellent. I love how you can tap a number and it highlights the others of the same value. The ads make the app completely useless, though. It takes several seconds to get through the ad, which is fine, but then the skip button (double chevron) brings you to the play store. After a minute or so, the skip button changes to an x, but that also brings you to the play store. There's no way to exit the ad. I thought upgrading phones would fix the issue but it didn't.
Robert Heyob
3 months ago
The puzzles are fantastic. Unfortunately, every so often, there's an ad redirect that opens the web browser. This redirection makes the game almost unplayable. Not sharing screenshots due to having already uninstalled the app, but the redirects were to Snapchat and to Amazon store pages.
Sydney Forbes
3 months ago
I love the game itself & greatly enjoy the variety of challenges, difficulty, & notation options! But some of the ADs pop up by opening a new tab in my browser & removing me from the game itself. This is really unfortunate because I do love the game. I understand the need for ADs and don't mind pop up ads, but they shouldn't pull you out of the app! Would be 5 stars if the ADs didn't pull me to my browser and out of the app.
Jade Richardson
5 months ago
The variants are so fun! I'm not very good at the harder ones still, but that just means there's plenty of room for challenge. And easy levels are still good, casual fun. The ads aren't too bad. One will often pop up during a level, but the levels are long and it's just one quick ad, so it's not obnoxious. And I hate ads, for context (well, who doesn't?).
Summer Lee
1 month ago
I really like this game but the problem is I don't want it only in portrait, I want it in landscape, and can you please add like a dark theme, like the pitch Black color theme to? But this game is good, I think it is the only one that they need to do... But overall, this is was a very great game, very addictive and mind clearing, like it releases my anxiety and calms me down😸😸😸
Wakka02
2 months ago
I enjoy this game. I bought the full version and I never regretted it. But I really only thought to come and leave a review after the latest update. If you're ever stuck, use the hint system, and it explains step by step with clear images the logic to arriving at the answer. Simply amazing. 6/5 will keep playing.
Caleb Mayrose
6 days ago
(FIX: Turn off wifi.) I still love this sudoku app, but I have found myself unable to use the app. I can open the app, and I reach the loading screen, which freezes near the end. and the app doesn't load. It worked just yesterday, and I can't recall changing anything since then. in response to this issue, I've updated the app and restarted my phone, but neither worked.
Yawnzie Chan
2 months ago
I would really like to rate this higher since the puzzles are really fun and engaging. However the ads are really bad. They take you out of the app, shut off any music that is playing randomly, pop up in the middle of levels throwing you off, etc. It's a combination of all the worst types of ads.
Nancy Williams
2 months ago
Variants option makes Sudoku more interesting I like how the variant rules change a bit from game to game. On medium level a game takes maybe 10 minutes or longer, which makes for a nice break,.c challenging but not too time consuming. I like that 2 errors are allowed but also having the option for continuing after a 3rd error if, say, the error was a bad click rather than an error in logic. There are ads but they are not ridiculously long or too frequent.
Tracy Chipman
3 months ago
Love the variants & game play, & don't mind the number of ads, but the issues with the ads need to be fixed! For almost every ad break, I just get a black screen instead of the actual ad. The ad never appears, nor the X, and I cannot hit the back button to exit the "ad" either. So I am forced to completely close and restart the app, wait for the app to reload, and usually still have to watch an ad once it restarts. Also a Walmart ad that takes you completely out of the app without warning.
