Nonograms Katana

Nonograms Katana

Sharpen your mind!

6.6K ratings
283 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 15, 2015
  • July 7, 2026

Features

Nonograms Katana video #1 for iPhone
Nonograms Katana screenshot #2 for iPhone
Nonograms Katana screenshot #3 for iPhone
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Nonograms Katana screenshot #5 for iPhone
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Nonograms Katana screenshot #7 for iPhone
Nonograms Katana screenshot #8 for iPhone
Nonograms Katana screenshot #9 for iPhone
iphone
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About

Engage in logic puzzles where you fill cells based on numerical clues to reveal hidden pictures. This app offers a vast collection of puzzles, tools for marking cells, and options to create and share your own challenges.

โœ“1001 nonogram puzzles
โœ“Create and share custom puzzles
โœ“Black-and-white and colored puzzles
โœ“Puzzles sorted by size
โœ“Hints and undo/redo functionality
โœ“Cloud save and achievements
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What users say

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What's New in Nonograms Katana

21.300

July 7, 2026

Adventurer's Guild and Dungeon expansions

3

In-App Purchases

$2.99

VIP version

No Ads; View Answer; 5 extra hints per puzzle

User reviews

look no further

Truly just the best nonogram app. Been playing this (or addicted) for 5 years now. The community feature is so good, endless large scale nonograms!

Best nonogram app

First, itโ€™s a great app. Challenging โ€” you can pick your difficulty โ€” and fun, with lots of content. No doubt good for my brain.

They do a great job with ads. Ads are fine; the developers deserve to make a profit. Too many apps allow ads you canโ€™t delete or are replaced by more ads. (Iโ€™ve uninstalled enough of them.). Not here. The ages are short โ€” so much so that I actually watch them โ€” and do not interrupt play. Itโ€™s almost like they want you to enjoy the program.
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Really good game but latest updateโ€ฆ

I love this game and really helps me relax. However I have come across some bugs in the last few days. For some reason the game crashes when I open it. I have closed and opened it and uninstalled which helped temporarily nut then it wipes all my settings so I have to redo all the settings so it matches my play style. Why canโ€™t this be linked to your account?

Please fix these issues because I really enjoy this game
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Better filtering would be nice

Overall quite good, but I wish filtering functionality were better. Itโ€™s not clear how the filter toggle buttons interactโ€”it would be great to have explicit include/exclude or and/or control.

I would also love to be able to filter size by one dimension. On mobile, I much prefer tall/narrow puzzles to short/wide, and Iโ€™m not aware of any way to specify that (such as max width). A second-best capability would be a rotate/transpose option.
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Nearly perfect

Great variety of puzzles and levels of complexity. I was happy to pay for full version and I use my Apple Pencil to accurately tap on the squares.
On the larger grids it would be helpful if I could tap on one row/column and the whole line be highlighted so itโ€™s easier to count/mark the squares.

User experience

๐Ÿž

Reported Bugs

5 issues

Puzzle progress not saving

Bug

Puzzle images not loading

Bug

Freezing/crashing on larger puzzles

Bug

Ads not playing properly

Bug

Compatibility issues with newer iOS versions

Bug
โœจ

Requested Features

7 requests

Dark mode option

Feature

Ability to rearrange/move puzzle pieces

Feature

Difficulty ratings for puzzles

Feature

Automatic line/row completion

Feature

Ability to follow/subscribe to users

Feature

Notification system for new puzzles

Feature

Diagonal line drawing tool

Feature

FAQ

What are Nonograms?

Nonograms, also known as Hanjie or Griddlers, are picture logic puzzles. You fill cells in a grid based on numerical clues on the sides to reveal a hidden image. The numbers indicate sequences of filled cells in each row or column.

What kind of puzzles does Nonograms Katana offer?

The app features 1001 nonogram puzzles, available in both black-and-white and colored versions. Puzzles are sorted by size, ranging from 5x5 to 50x50, and all are tested to have unique solutions.

Is Nonograms Katana free to play?

The core game with all 1001 puzzles is free. There are optional VIP features available for purchase, such as ad removal, viewing the answer, and extra hints.

Can I create my own puzzles?

Yes, you can create and share your own nonogram puzzles with other users. This feature allows for an endless supply of new challenges and the ability to test your puzzle-making skills.

What tools are available to help solve puzzles?

The app provides 15 free hints per puzzle, along with tools like crosses, dots, and other symbols for marking cells. It also includes features like auto cross-out numbers and auto-fill for completed lines to aid in the solving process.