# ADI BOOK vs DI App

ADI BOOK and DI App are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | ADI BOOK | DI App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 61 MB | 7 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ADI BOOK LIMITED](https://appshunter.io/developer/1801016102) | [HDT Apps](https://appshunter.io/developer/1895298444) |

## 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


### DI App

[App page](https://appshunter.io/ios/app/di-app/id6778798652)

**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 DI App free?

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

### Do ADI BOOK or DI App have ads?

Neither ADI BOOK nor DI App 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.*