Comparison

Dottos vs Nonograms Katana

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Dottos

A simple and fun game where players match five dots of the same color. Compete with others by submitting your score to the Game Center.

Highlights
  • Match 5 dots
  • Vertical, horizontal, diagonal matches
  • Score submission
  • Game Center integration
  • Leaderboards
Features
Read full description

Dottos is a simple, relaxing puzzle game: line up 5 or more dots of the same color – horizontally, vertically or diagonally – and watch them disappear. • Tap a dot to select it, then tap an empty field to move it there. A dot can only travel along a free path. • Every move that doesn't clear a line adds three new dots. You can always see which colors come next. • You get one point for every dot that disappears. The game ends when the board is full. Made with color-blind players in mind: turn on numbers on the dots in Options and tell every color apart without guessing. • Interactive tutorial • Your game is saved automatically – continue anytime • Local high scores • Works offline, no ads, no tracking • iPhone and iPad

About

Nonograms Katana

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.

Highlights
  • 1001 nonogram puzzles
  • Create and share custom puzzles
  • Black-and-white and colored puzzles
  • Puzzles sorted by size
  • Hints and undo/redo functionality
  • Cloud save and achievements
Features
Read full description

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 - 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 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

Screenshots

Dottos4 screens
Nonograms Katana4 screens

Verdict

The call

The clearest difference is in-app purchases: Dottos at none against Nonograms Katana's 3. Nonograms Katana's advantage is update cadence (every 3 months vs every 77 months) and ratings volume (6.8K vs 2). On price, rating, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Nonograms Katana sells 3 one-off in-app purchases. Dottos asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dottos holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Nonograms Katana has 6.8K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Dottos ships an update every 77 months, Nonograms Katana every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Dottos versus Nonograms Katana: the parameters behind the verdict, then further details
ParameterDottosNonograms Katana
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (6.8K ratings)
Positive reviews—82.9% of reviews
Number of ratings26.8K — better
Update frequencyEvery 77 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size62 MB27 MB
Age rating4+12+
DeveloperMarek MoscichowskiUcdevs Interaction DOO

Customer experience

Dottos

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Nonograms Katana

All ratings6,245 ratings
Positive97.2%
Neutral1.7%
Negative1.1%
Written reviews339 reviews
Positive82.9%
Neutral5.3%
Negative11.8%

Bugs and requests

Dottos

Not enough reviews yet to summarise bugs or requests.

Nonograms Katana

Reported bugs

5 issues
  • Puzzle progress not saving
  • Puzzle images not loading
  • Freezing/crashing on larger puzzles
  • Ads not playing properly
  • Compatibility issues with newer iOS versions

Requested features

7 requests
  • Dark mode option
  • Ability to rearrange/move puzzle pieces
  • Difficulty ratings for puzzles
  • Automatic line/row completion
  • Ability to follow/subscribe to users
Show 2 more
  • Notification system for new puzzles
  • Diagonal line drawing tool

In-app purchases

None

Dottos

No in-app purchases

3 purchases

Nonograms Katana

One-time3
  • 80 Hints$0.99
  • 200 Hints$1.99
  • VIP version$5.99

Questions

Is Dottos free?
Dottos is free to download, with no in-app purchases.
Is Nonograms Katana free?
Nonograms Katana is free to download, with in-app purchases available.
Which has better reviews, Dottos or Nonograms Katana?
Dottos is rated higher. Dottos averages 5.0 out of 5 from 2 ratings, while Nonograms Katana averages 4.8 from 6.8K ratings.
Do Dottos or Nonograms Katana have ads?
Neither Dottos nor Nonograms Katana shows ads.
Which is updated more often, Dottos or Nonograms Katana?
Dottos ships an update every 77 months, and Nonograms Katana every 3 months. Most recently, Dottos was updated on November 1, 2026 and Nonograms Katana on November 2, 2026.

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