# expt vs Books Pro

The clearest difference is iOS requirement: expt at 15.1 against Books Pro's 17. 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 | expt | Books Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/books-pro-fast-offline-reader/id6788651302/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | — | Free |
| Size | 45 MB | 9 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arthur Park](https://appshunter.io/developer/1448983841) | [ECOLOGICALM, UAB](https://appshunter.io/developer/1858935420) |

## What reviewers say

### expt

[App page](https://appshunter.io/ios/app/expt-file-reader/id6760808933)

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

**In-app purchases:** none


### Books Pro

[App page](https://appshunter.io/ios/app/books-pro-fast-offline-reader/id6788651302)

This app provides a fast and elegant offline reading experience for your books. Keep your entire library on your device for reliable access anytime, anywhere, without needing an internet connection. Organize your reading space, save quotes, and track your progress with ease.

**Highlights:** Reliable offline reading, One Click access, Clean personal library, Book collections, Reading progress saving, Quote saving and sharing, iCloud sync

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

**In-app purchases:** none


## Frequently asked questions

### Is expt free?

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

### Is Books Pro free?

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

### Do expt or Books Pro have ads?

Neither expt nor Books Pro 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.*