# 数独 vs K.O. Nonogram

The clearest difference is update cadence: K.O. Nonogram at every 5 days against 数独's every 37 months. K.O. Nonogram also leads on monetization model (ad-supported vs free with in-app purchases). 数独's advantage is ratings volume (56 vs 2) and review sentiment (97% vs 85%). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 数独 against 5.0 for K.O. Nonogram. That said, the two scores are not equally well evidenced: 数独 has 56 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 97% of 数独's written reviews are positive against 85% of K.O. Nonogram's.

数独 ships an update every 37 months, K.O. Nonogram every 5 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 数独 | K.O. Nonogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (56 ratings)](https://appshunter.io/ios/app/id1582743885/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ko-nonogram/id1626831214/reviews)** |
| Number of ratings | **56** | 2 |
| Positive reviews | **96.9% of reviews** | 85.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 37 months | **Every 5 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 74 MB | 42 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [建华 范](https://appshunter.io/developer/1444536951) | [又瑞 韦](https://appshunter.io/developer/1625836878) |

## What reviewers say

### 数独

[App page](https://appshunter.io/ios/app/id1582743885)

Enjoy the classic logic puzzle with a clean interface and no ads or in-app purchases. Offers various grid sizes and difficulty levels to challenge your mind. Features customizable skins and a night mode for comfortable play.

**Highlights:** No ads, no in-app purchases, Multiple grid sizes (4x4, 6x6, 8x8, 9x9), 12 difficulty levels, Customizable skins, Night mode, Unlimited hints

**Features:** macOS Compatibility

**In-app purchases:** none


### K.O. Nonogram

[App page](https://appshunter.io/ios/app/ko-nonogram/id1626831214)

Instantly solve Nonogram puzzles with step-by-step guidance. Supports grids from 5x5 to 50x50. Explore a vast online store for printable puzzles.

**Highlights:** Instant puzzle solving, Step-by-step guidance, Supports 5-50 grid sizes, Online puzzle store, Printable puzzle support

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

**In-app purchases:** none


## Frequently asked questions

### Is 数独 free?

数独 is free to download, with no in-app purchases.

### Is K.O. Nonogram free?

K.O. Nonogram is free to download, with no in-app purchases.

### Which has better reviews, 数独 or K.O. Nonogram?

K.O. Nonogram is rated higher. 数独 averages 5.0 out of 5 from 56 ratings, while K.O. Nonogram averages 5.0 from 2 ratings.

### Do 数独 or K.O. Nonogram have ads?

Both 数独 and K.O. Nonogram show ads.

### Which is updated more often, 数独 or K.O. Nonogram?

数独 ships an update every 37 months, and K.O. Nonogram every 5 days. Most recently, 数独 was updated on October 24, 2026 and K.O. Nonogram on October 27, 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.*