# Quill vs Books Pro

The clearest difference is update cadence: Books Pro at every 3 days against Quill's every 9 days. On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Quill against 5.0 for Books Pro. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Quill ships an update every 9 days, Books Pro every 3 days. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Quill | Books Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/quill-ai-book-reader/id6762075206/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/books-pro-fast-offline-reader/id6788651302/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Free | Free |
| Size | 20 MB | 12 MB |
| Requires iOS | 17.0 | 17 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [思涵 岳](https://appshunter.io/developer/1885417868) | [Ecologicalm UAB](https://appshunter.io/developer/1858935420) |

## What reviewers say

### Quill

[App page](https://appshunter.io/ios/app/quill-ai-book-reader/id6762075206)

This application enhances your reading experience by providing AI-powered definitions, translations, and contextual explanations for any word or passage within your imported EPUB and PDF books. It offers instant insights to deepen comprehension.

**Highlights:** AI-powered explanations, Instant definitions, Contextual understanding, Import EPUB and PDF, Word and passage lookup

**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, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is Quill free?

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

### Is Books Pro free?

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

### Which has better reviews, Quill or Books Pro?

Quill and Books Pro are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Quill or Books Pro have ads?

Neither Quill nor Books Pro shows ads.

### Which is updated more often, Quill or Books Pro?

Quill ships an update every 9 days, and Books Pro every 3 days. Most recently, Quill was updated on October 23, 2026 and Books Pro on October 31, 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.*