# Sharp Eye Challenge vs Knotwork Puzzle

The clearest difference is in-app purchases: Sharp Eye Challenge at none against Knotwork Puzzle's 1. Sharp Eye Challenge also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Knotwork Puzzle sells 1 one-off in-app purchase. Sharp Eye Challenge asks for nothing beyond the download.

## The numbers

| Metric | Sharp Eye Challenge | Knotwork Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Daily |
| Size | 100 MB | 26 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thai Tran Hong](https://appshunter.io/developer/1858505088) | [Emre Buyukegribey](https://appshunter.io/developer/1545814018) |

## What reviewers say

### Sharp Eye Challenge

[App page](https://appshunter.io/ios/app/sharp-eye-challenge/id6760840397)

**In-app purchases:** none


### Knotwork Puzzle

[App page](https://appshunter.io/ios/app/knotwork-puzzle-loop-lines/id6789190248)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Sharp Eye Challenge free?

Sharp Eye Challenge is free to download, with no in-app purchases.

### Is Knotwork Puzzle free?

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

### Do Sharp Eye Challenge or Knotwork Puzzle have ads?

Knotwork Puzzle shows ads; Sharp Eye Challenge does not.

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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.*