# Instructor Hub vs ADI BOOK

The clearest difference is in-app purchases: ADI BOOK at none against Instructor Hub's 2. ADI BOOK also leads on update cadence (fortnightly vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Instructor Hub sells 2 in-app purchases, starting at $12.99 per month. ADI BOOK asks for nothing beyond the download.

Instructor Hub ships an update every 7 months, ADI BOOK fortnightly. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Instructor Hub | ADI BOOK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 69 MB | 61 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [David Langan](https://appshunter.io/developer/1785004929) | [ADI BOOK LIMITED](https://appshunter.io/developer/1801016102) |

## What reviewers say

### Instructor Hub

[App page](https://appshunter.io/ios/app/instructor-hub/id6740092333)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| Annual | $149.99 | per year |


### ADI BOOK

[App page](https://appshunter.io/ios/app/adi-book-instructor/id6743073433)

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

**In-app purchases:** none


## Frequently asked questions

### Is Instructor Hub free?

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

### Is ADI BOOK free?

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

### Do Instructor Hub or ADI BOOK have ads?

Neither Instructor Hub nor ADI BOOK shows ads.

### Which is updated more often, Instructor Hub or ADI BOOK?

Instructor Hub ships an update every 7 months, and ADI BOOK fortnightly. Most recently, Instructor Hub was updated on October 12, 2026 and ADI BOOK on October 5, 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.*