Nonograms Katana

Nonograms Katana

Sharpen your mind!

6.6K ratings
339 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
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Nonograms Katana screenshot #7 for iPhone
Nonograms Katana screenshot #8 for iPhone
Nonograms Katana screenshot #9 for 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

See all reviews

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

porn ads in app

The game itself i love but the ads when you start the game open to porn sites. I accidentally tapped on one and opened it in front of my kid.

Great fun, well implemented

This is great! So many customisable options and itโ€™s the best app for Nonograms around.

At only $5 to remove ads (very short ads by the way) the amount of content is amazing. Good social features too if youโ€™re into that.

Regardless, you can play other Nonograms created by other uses. Literally thousands and thousands to play through.

I canโ€™t imagine doing some of the bigger ones (above 25 rows/columns) on phone, but the pinch in/out and move is easy and intuitive.

I think Iโ€™ll get a ton of use and fun out of this app! And I would recommend it to anyone. It has its high ratings in the App Store for a reason!

Get it today, you wonโ€™t regret it.
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Too many Temu ads

The ads are nothing but Temu which I canโ€™t stand anymore. I got a virus because of those ads. Get rid of all of them right now!

Very relaxing

Only usually the odd short advert.

One thing

Please please please let me cross vertical and horizontal arrows

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
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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.