Nonograms Katana: Sharpen your mind!
Nonograms, also known as Hanjie, Griddlers, Picross, Japanese Crosswords, Japanese Puzzles, Pic-a-Pix, "Paint by numbers" and other names, are picture logic puzzles in which cells in a grid must be colored or left blank according to numbers at the side of the grid to reveal a hidden picture. The numbers are a form of discrete tomography that measures how many unbroken lines of filled-in squares there are in any given row or column. For example, a clue of "4 8 3" would mean there are sets of four, eight, and three filled squares, in that order, with at least one blank square between successive groups.
To solve a puzzle, one needs to determine which cells will be boxes and which will be empty. Determining which cells are to be left empty (called spaces) is as important as determining which to fill (called boxes). Later in the solving process, the spaces help determine where a clue (continuing block of boxes and a number in the legend) may spread. Solvers usually use a dot or a cross to mark cells they are certain are spaces.
It is also important never to guess. Only cells that can be determined by logic should be filled. If guessing, a single error can spread over the entire field and completely ruin the solution.
- 1001 nonograms
- All puzzles are free
- All puzzles tested by computer program and have unique solution
- Black-and-white and colored
- Nonograms sorted by groups from 5x5 to 50x50
- Download puzzles sent by other users
- Create and share your own puzzles
- 15 free hints per puzzle
- Use crosses, dots and other symbols to mark cells
- Auto cross out numbers
- Auto fill trivial and completed lines
- Auto save; if you stuck you can try another puzzle and come back later
- Zoom and smooth scrolling
- Lock and zoom number bars
- Lock current puzzle state, check assumptions
- Customize background
- Optional cursor for accurate picking
- Undo and redo
- Share result pictures
- Save game progress to the cloud
- Achievements and leaderboards
- Screen rotation
- Suitable for phones and tablets
- No Ads
- View Answer
- 5 extra hints per puzzle
- Modern iOS support
- Minor fixes
- Hotfix for iOS 9
Ratings and Reviews
Best nonogram by far
I did rare this 5 stars but I would like to see a change. Currently if you make a mistake you can’t tell it’s a mistake until it contradicts something else. And you can go back but you don’t know how far is necessary. You CAN check for ‘correctness’ but the way it does, I couldn’t figure out if it was right or not. It was corrected but I couldn’t tell what it affected. I’d like to see just a highlight of what is wrong and I’d like to correct it so I know what it affects. Also a clue to how many mistakes would be nice. I don’t want to keep playing if there are mistakes.
If there was a counter for number of mistakes and I could just go back till it was zero and figure it out myself, that would be ideal :)
I’ve tried many nonogram apps and this one is my favorite by far. There are others with adventure style play but this one is just simple and I like that.
Best nonogram I’ve used
I’ve been downloading different nonogram apps for months and this one is by far the winner. I’m very picky with my games, so large amounts of ads before, after, and during puzzle time are a huge turn off. This app definitely doesn’t do that and I love it.
I like that I can choose which puzzles to do and that it gives me color choices, I don’t use them because I’m too busy concentrating on the puzzle, but it’s a cool feature nonetheless. I know there’s a VIP version of the game and I’m not sure what extra features it carries, but the free version works splendidly.
I definitely recommend it to anyone who wants to put their mind to the test.
Best Nonogram ever
I am so glad I found this app. I easily get bored with games so I usually stick to puzzle games but I can easily say this app really satisfies me. Unlike the other app called Picture cross who got lazy with coming up with ideas, u can tell the creators really took their time to create something others would enjoy. I hope they continue to update so we can like and follow people for their content, as I think it’s a great idea to inspire others to create other nonograms themselves. Again, this is an outstanding app. I love it so much and I can easily say that i play this game the most on my phone than my other games lol
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- Alexander Leontyev
- 19 MB
- Requires iOS 9.0 or later.
- Requires iPadOS 9.0 or later.
- iPod touch
- Requires iOS 9.0 or later.
- Requires macOS 11.0 or later and a Mac with Apple M1 chip.
English, Czech, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Ukrainian
- Age Rating
- 12+ Infrequent/Mild Medical/Treatment Information Infrequent/Mild Profanity or Crude Humor
- © 2014 Alexander Leontyev
- In-App Purchases
- 200 Hints $1.99
- VIP version $2.99
- 80 Hints $0.99
Challenge friends and check leaderboards and achievements.
With Family Sharing set up, up to six family members can use this app.