# 15 Puzzle Polygon vs K.O. Nonogram Pro

The clearest difference is price: 15 Puzzle Polygon at Free against K.O. Nonogram Pro's $9.99. K.O. Nonogram Pro's advantage is in-app purchases (none vs 1) and update cadence (every 6 days vs every 6 weeks). On ads, device support and iOS requirement there is nothing between them.

15 Puzzle Polygon is free to download; K.O. Nonogram Pro costs $9.99 up front. 15 Puzzle Polygon sells 1 one-off in-app purchase. K.O. Nonogram Pro asks for nothing beyond the download.

15 Puzzle Polygon ships an update every 6 weeks, K.O. Nonogram Pro every 6 days. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 15 Puzzle Polygon | K.O. Nonogram Pro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/15-puzzle-polygon/id1493750827/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 19 MB | 28 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [振华 许](https://appshunter.io/developer/1437340417) | [又瑞 韦](https://appshunter.io/developer/1625836878) |

## What reviewers say

### 15 Puzzle Polygon

[App page](https://appshunter.io/ios/app/15-puzzle-polygon/id1493750827)

Engage your mind with a variety of logic and puzzle games. Explore unique variations of classic puzzles like the 15-puzzle, tile matching, and color-based challenges. Offers numerous levels and modes to test your thinking skills.

**Highlights:** Extended 15-puzzle variations, Hexagonal and triangular boards, Tile matching with various shapes, Color-based logic puzzles, Maze and rotating puzzles, Nonogram and number puzzles

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### K.O. Nonogram Pro

[App page](https://appshunter.io/ios/app/ko-nonogram-pro/id6737248261)

This app provides instant solutions and solving steps for Nonogram puzzles. It supports grids from 5x5 to 50x50 and offers features like cloud backup and printing capabilities. Enjoy an ad-free experience with unlimited prompts and access to all puzzles.

**Highlights:** Instant puzzle solutions, Unlimited prompts, Unlock all puzzles, Print puzzles, Cloud backup, Supports 5x5 to 50x50 grids

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 15 Puzzle Polygon free?

15 Puzzle Polygon is free to download, with in-app purchases available.

### Is K.O. Nonogram Pro free?

K.O. Nonogram Pro costs $9.99, with no in-app purchases.

### Do 15 Puzzle Polygon or K.O. Nonogram Pro have ads?

Both 15 Puzzle Polygon and K.O. Nonogram Pro show ads.

### Which is updated more often, 15 Puzzle Polygon or K.O. Nonogram Pro?

15 Puzzle Polygon ships an update every 6 weeks, and K.O. Nonogram Pro every 6 days. Most recently, 15 Puzzle Polygon was updated on October 18, 2026 and K.O. Nonogram Pro on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*