# Sharp Eye Challenge vs Knotle

The clearest difference is in-app purchases: Sharp Eye Challenge at none against Knotle's 1. Sharp Eye Challenge also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | Sharp Eye Challenge | Knotle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 100 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thai Tran Hong](https://appshunter.io/developer/1858505088) | [Raja Erupaka](https://appshunter.io/developer/6791415466) |

## What reviewers say

### Sharp Eye Challenge

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

**In-app purchases:** none


### Knotle

[App page](https://appshunter.io/ios/app/knotle/id6791415464)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knotle+ | $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 Knotle free?

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

### Do Sharp Eye Challenge or Knotle have ads?

Neither Sharp Eye Challenge nor Knotle shows ads.

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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.*