# 4DI vs Global Audiobook Hub

The clearest difference is iOS requirement: 4DI at 18.6 against Global Audiobook Hub's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | 4DI | Global Audiobook Hub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 5 MB | 8 MB |
| Requires iOS | **18.6** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Poetzsch](https://appshunter.io/developer/1860642630) | [KG Digital Service LLC](https://appshunter.io/developer/6781370455) |

## What reviewers say

### 4DI

[App page](https://appshunter.io/ios/app/4di-data-integrity-tool/id6760180866)

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

**In-app purchases:** none


### Global Audiobook Hub

[App page](https://appshunter.io/ios/app/global-audiobook-hub/id6781656138)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 4DI free?

4DI is free to download, with no in-app purchases.

### Is Global Audiobook Hub free?

Global Audiobook Hub is free to download, with no in-app purchases.

### Do 4DI or Global Audiobook Hub have ads?

Neither 4DI nor Global Audiobook Hub 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.*