Nonograms Katana

Contains adsIn-app purchases
198K reviews
Content rating
PEGI 12
5M+
Downloads
Content rating
PEGI 12
Mild Swearing
Users Interact, In-Game Purchases
Learn more
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About this game

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.

Features:
- 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 and font
- Switch day and night modes, customize color schemes
- Optional cursor for accurate picking
- Undo and redo
- Share result pictures
- Save game progress to the cloud
- Achievements and leaderboards
- Screen rotation, as well as puzzle rotation
- Suitable for phones and tablets

VIP Features:
- No Ads
- View Answer
- 5 extra hints per puzzle

The Guild Expansion:
Welcome to the Adventurers Guild!
By solving puzzles, you will get loot and experience.
You will have weapons that allow you to deal with puzzles much faster.
You will be able to complete quests and receive a reward.
You will have to rebuild the settlement and collect the lost mosaic piece by piece.

The Dungeon Expansion:
Game in a game in a game.
Isometric turn-based RPG.
What adventurer doesn't dream of exploring a dungeon?

site: https://nonograms-katana.com
facebook: https://www.facebook.com/Nonograms.Katana
Nonograms Katana: Sharpen your mind!
Updated on
Jul 13, 2026
Available on
Android, Windows

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity, App info and performance, and Device or other IDs
  • This app may collect these data types
    Personal info, App activity and 2 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

166K reviews
E T
August 28, 2026
It is the best nonograms app out there. The nonos are of high levels, some are true works of art, so thanks a lot designers. And then there is the guild, where you build a city and a dungeon with RGP mechanics. One word: addictive. If you start, you will want to build all of them and discover all the new features. It is VERY time-consuming and sometimes complicated, but fear not: you are not alone. The community is one of the best bits.
4 people found this review helpful
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Alex Shaw
September 11, 2020
Wish I'd discovered the "guild" mode earlier; you need a lot of timber and stone to build buildings, and you usually don't get much from solving puzzles (this part of the game is entirely optional though, to be fair… I just wish the drops were more balanced as I'm usually showered with "weapons" that I'll never use, while building materials come along once in a blue moon… even with the "+% drop chance" skill)
12 people found this review helpful
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Tegan Darch
July 23, 2025
I can't rate this game highly enough. As a nonograms game it's great. Loads of puzzles available (users can sumbit their own) and a massive range of difficulties available. The guild takes things to a whole other level. It can be confusing at the start, but fans have made a wiki to explain all the various things. This is not a game to complete in a day or two, more like years, but all the better for it. Going advert free cost me about the same as a coffee - well worth doing.
9 people found this review helpful
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What’s new

- System navigation bar modernized (Android 15+ Edge-to-edge)
- Migrated to Google Ads Next-Gen SDK
- Minor fixes and improvements