# ADI BOOK vs Holte School

The clearest difference is update cadence: ADI BOOK at fortnightly against Holte School's every 2 months. ADI BOOK also leads on iOS requirement (13.0 vs 17.0). 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.

ADI BOOK ships an update fortnightly, Holte School every 2 months. The most recent releases landed on October 5, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | ADI BOOK | Holte School |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 61 MB | 139 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [ADI BOOK LIMITED](https://appshunter.io/developer/1801016102) | [Weduc UK Ltd](https://appshunter.io/developer/1635738266) |

## What reviewers say

### ADI BOOK

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

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

**In-app purchases:** none


### Holte School

[App page](https://appshunter.io/ios/app/holte-school/id6761009082)

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

**In-app purchases:** none


## Frequently asked questions

### Is ADI BOOK free?

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

### Is Holte School free?

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

### Do ADI BOOK or Holte School have ads?

Neither ADI BOOK nor Holte School shows ads.

### Which is updated more often, ADI BOOK or Holte School?

ADI BOOK ships an update fortnightly, and Holte School every 2 months. Most recently, ADI BOOK was updated on October 5, 2026 and Holte School on September 27, 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.*