Comparison

Sky Castle vs GridSwan (Nonogram Puzzles)

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

Head to head
About

Sky Castle

Embark on a puzzle-solving adventure to reach a heavenly castle. Enjoy hundreds of logic puzzles with beautiful scenery and a convenient interface. Features include hints, auto-save, and one-handed mode for on-the-go play.

Highlights
  • Hundreds of puzzle games
  • Color dot design
  • Detailed puzzle logic check
  • Auto-save functionality
  • Multiple difficulty levels
  • Convenient touch interface
  • One-handed mode
Features
Read full description

Complete your journey to the amazing Castle of Heaven by solving the puzzle. A fantastic journey to find the castle in the sky you first saw when you were young. See the beautiful scenery of the sea, mountains and valleys on your journey to the castle. Solve the puzzles and complete the journey to your wonderful destination. *Special features* - Hundreds of puzzle games are available. - Great color dot design to match the map’s themes. - Detailed puzzle logic check. - Auto-save for puzzles in play. - Various level of difficulty (5x5, 10x10, 15x15, 20x20) - Convenient interface using touch & pad simultaneously. - Various plays available through single map and big map. - Hint function. - Provides a variety of functions for user convenience (auto answer check, Undo / Redo) - Zoom-in, zoom-out and move function using two fingers. - One-handed mode support for using in public/crowded places. License confirmation file BGM--- Zen Yoga - Music by Manuel Ochoa / Melody Loops Dreamy Dreamland - Music by AG Music / Melody Loops Just A Little Hope - Music by AG Music / Melody Loops

About

GridSwan (Nonogram Puzzles)

Solve logic puzzles by filling in cells based on number clues to reveal hidden images. Explore various puzzle types, including black & white, colored, and triangle grids. Design and share your own puzzles with others.

Highlights
  • Thousands of puzzles with updates
  • Supports standard, colored, triangle, and multi griddlers
  • Advanced UI controls for easy solving
  • Design and share custom puzzles
  • Backup and restore solutions
Features
Read full description

GridSwan is a powerful nonogram puzzle app for solving logic puzzles, also known as griddlers, hanjie, picross, Japanese crosswords, kare karalamaca, cryptopics, or pic-a-pix. Use number clues to reveal hidden pixel-art images on the grid. Enjoy thousands of free nonogram puzzles, multiple puzzle types, smart solving tools, and regularly added new puzzles. FEATURES: • Thousands of free nonogram puzzles • New puzzles added regularly • Standard black-and-white, colored, triangle, and multi puzzles • Smooth controls for large and complex puzzles: Zoom, scroll, multi-cell selection, undo, and redo • Checkpoints to try different solving paths and backtrack when needed • Cloud backup and restore across devices • Create your own puzzles by drawing, importing images, or generating them from text with AI • Share your puzzles with friends or publish them for other players NOTES: • Please use the Feedback menu to report problems so we can receive your device details and help you better. • Number clues are only there to help you. They are not part of the actual puzzle solution. • To publish your own puzzles, share them and choose Publish. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.puzzlehouseapps.com/privacy_policies/gridswan

Screenshots

Sky Castle4 screens
GridSwan (Nonogram Puzzles)4 screens

Verdict

The call

The clearest difference is review sentiment: Sky Castle at 83% against GridSwan (Nonogram Puzzles)'s 35%. Sky Castle also leads on rating (4.9 vs 4.4) and iOS requirement (11.0 vs 17.0). GridSwan (Nonogram Puzzles)'s advantage is update cadence (every 4 days vs every 3 months) and ratings volume (134 vs 27). On price, ads, in-app purchases and monetization model 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. Sky Castle sells 1 one-off in-app purchase and GridSwan (Nonogram Puzzles) sells 11 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sky Castle holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 27 and 134 respectively. Written reviews point the same way: 83% of Sky Castle's written reviews are positive against 35% of GridSwan (Nonogram Puzzles)'s.

UpkeepUpdate frequency

Sky Castle ships an update every 3 months, GridSwan (Nonogram Puzzles) every 4 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Sky Castle versus GridSwan (Nonogram Puzzles): the parameters behind the verdict, then further details
ParameterSky CastleGridSwan (Nonogram Puzzles)
PriceFreeFree
Rating4.9 (27 ratings) — better4.4 (134 ratings)
Positive reviews82.8% of reviews — better34.8% of reviews
Number of ratings27134 — better
Update frequencyEvery 3 monthsEvery 4 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size110 MB217 MB
Age rating4+9+
DeveloperKWANG YEOUL YOOALI YILDIZ-PUZZLEHOUSEAPPS

Customer experience

Sky Castle

All ratings25 ratings
Positive96.0%
Neutral4.0%
Negative0.0%
Written reviews64 reviews
Positive82.8%
Neutral10.9%
Negative6.3%

GridSwan (Nonogram Puzzles)

All ratings134 ratings
Positive83.6%
Neutral4.5%
Negative11.9%
Written reviews23 reviews
Positive34.8%
Neutral13.0%
Negative52.2%

Bugs and requests

Sky Castle

Reported bugs

11 issues
  • Crashes frequently
  • Progress not saved on crashes
  • Puzzles not completing after filling
  • Buttons not working correctly (e.g., 'tweezer' bug)
  • Occasional duplicate solutions/ambiguous puzzles
Show 6 more
  • Ads still appear after paying for ad-free
  • App closes unexpectedly
  • Bug where filling a square disappears
  • Bug where clicking wrong spot doesn't show error
  • Bug where hearts disappear without action
  • Bug with 7th level 'tweezer'

Requested features

8 requests
  • More levels/content
  • Account linking (Facebook/Google) for progress sync
  • Option to reset progress
  • Improve button placement for larger puzzles
  • Better translation for instructions
Show 3 more
  • Add more puzzles to the list
  • Make screen larger or puzzles smaller
  • Add a back button

GridSwan (Nonogram Puzzles)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Sky Castle

One-time1
  • remove ad$2.99
11 purchases

GridSwan (Nonogram Puzzles)

Subscriptions3
  • 1 Month$7.991 Month
  • 6 Months$33.996 Months
  • 1 Year$59.991 Year
One-time8
  • 5 Images$1.29
  • Enable Checkpoint$1.49
  • 10 Tips$1.99
Show 5 more
  • 25 Images$3.99
  • 50 Tips$7.99
  • 50 Images$8.99
  • 100 images$9.99
  • 100 Tips$11.99

Questions

Is Sky Castle free?
Sky Castle is free to download, with in-app purchases available.
Is GridSwan (Nonogram Puzzles) free?
GridSwan (Nonogram Puzzles) is free to download, with in-app purchases available.
Which has better reviews, Sky Castle or GridSwan (Nonogram Puzzles)?
Sky Castle is rated higher. Sky Castle averages 4.9 out of 5 from 27 ratings, while GridSwan (Nonogram Puzzles) averages 4.4 from 134 ratings.
Do Sky Castle or GridSwan (Nonogram Puzzles) have ads?
Both Sky Castle and GridSwan (Nonogram Puzzles) show ads.
Which is updated more often, Sky Castle or GridSwan (Nonogram Puzzles)?
Sky Castle ships an update every 3 months, and GridSwan (Nonogram Puzzles) every 4 days. Most recently, Sky Castle was updated on October 21, 2026 and GridSwan (Nonogram Puzzles) on October 24, 2026.

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