# Opamp tools vs Open

The clearest difference is in-app purchases: Open at none against Opamp tools's 1. Opamp tools's advantage is iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Opamp tools sells 1 one-off in-app purchase. Open asks for nothing beyond the download.

## The numbers

| Metric | Opamp tools | Open |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | — |
| Size | 4 MB | 61 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Fundación Ibercivis](https://appshunter.io/developer/1475077479) |

## What reviewers say

### Opamp tools

[App page](https://appshunter.io/ios/app/opamp-tools/id1616271826)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $1.99 | one-time |


### Open

[App page](https://appshunter.io/ios/app/open-red/id6772456232)

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

**In-app purchases:** none


## Frequently asked questions

### Is Opamp tools free?

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

### Is Open free?

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

### Do Opamp tools or Open have ads?

Neither Opamp tools nor Open 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.*