# K.O. Nonogram vs Grid Hero

The clearest difference is in-app purchases: K.O. Nonogram at none against Grid Hero's 3. Grid Hero's advantage is review sentiment (100% vs 85%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Grid Hero sells 3 in-app purchases, starting at $1.99 per month. K.O. Nonogram asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for K.O. Nonogram against 5.0 for Grid Hero. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 85% of K.O. Nonogram's written reviews are positive against 100% of Grid Hero's.

K.O. Nonogram ships an update every 5 days, Grid Hero weekly. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | K.O. Nonogram | Grid Hero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/ko-nonogram/id1626831214/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/grid-hero-logic-puzzles/id6474739003/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 85.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 42 MB | 32 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [又瑞 韦](https://appshunter.io/developer/1625836878) | [YIKAI WANG](https://appshunter.io/developer/634355643) |

## What reviewers say

### 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


### Grid Hero

[App page](https://appshunter.io/ios/app/grid-hero-logic-puzzles/id6474739003)

This app offers a vast collection of number-based logic puzzles, including Sudoku, Hitori, and Minesweeper. It provides daily challenges and new levels weekly, with new games continually being added. Enjoy a growing library of brain-teasing fun.

**Highlights:** Extensive logic puzzle collection, Daily bonus and challenge, Weekly new challenge levels, Continuous addition of new games, Multiple subscription options

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $1.99 | per month |
| Premium (Quarterly) | $4.99 | per 3 months |
| Premium (Annual) | $17.99 | per year |


## Frequently asked questions

### Is K.O. Nonogram free?

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

### Is Grid Hero free?

Grid Hero is free to download, with in-app purchases available.

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

K.O. Nonogram and Grid Hero are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do K.O. Nonogram or Grid Hero have ads?

Both K.O. Nonogram and Grid Hero show ads.

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

K.O. Nonogram ships an update every 5 days, and Grid Hero weekly. Most recently, K.O. Nonogram was updated on September 19, 2026 and Grid Hero on September 9, 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.*