# Quill - AI Book Reader — AI-Powered Ebook Reader

> AI-powered ebook reader for instant definitions, translations, and explanations. (iPhone/iPad app by 思涵 岳.)

- Source: https://appshunter.io/ios/app/quill-ai-book-reader/id6762075206 (this page in markdown: same URL + `.md`)
- Developer: [思涵 岳](https://appshunter.io/developer/1885417868)
- Category: Books, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 20 MB
- Languages: English
- Released: 2026-04-14
- Data updated: 2026-07-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/quill-ai-book-reader/id6762075206/reviews.md

## What is Quill?

Quill is an ebook reader with built-in AI that helps you understand what you read. Import your EPUB and PDF books, then tap any word or passage to get instant definitions, translations, and contextual explanations

## Key features

- AI-powered explanations
- Instant definitions
- Contextual understanding
- Import EPUB and PDF
- Word and passage lookup


## Frequently asked questions about Quill

### What file formats does Quill support?

Quill supports EPUB and PDF file formats, allowing you to import your existing ebook library directly into the application for enhanced reading.

### How does Quill's AI help with understanding books?

Quill's AI provides instant definitions, translations, and contextual explanations for words or passages you tap on, helping you to grasp complex ideas and vocabulary more effectively.

### Is Quill available on Android devices?

Currently, Quill is only supported on iPhone devices. Information regarding Android compatibility has not yet been released.

### How often is Quill updated?

Quill was last updated on June 3, 2026, with version 1.2.1. The frequency of future updates will depend on developer plans.

### What is the age rating for Quill?

Quill has an age rating of 4+, making it suitable for a wide range of users looking to improve their reading comprehension.

### Does Quill have ads?

No, Quill does not contain advertisements. The application is free to use without any ad interruptions.

### What do users like about Quill?

Based on the single rating available, Quill has received a perfect 5.0 stars, indicating a highly positive initial user reception for its AI-powered reading assistance.

### What is the price of Quill?

Quill is completely free to download and use. There are no in-app purchases or subscription fees associated with this application.

## Version history (last 4 releases)

### 1.2.1 — 2026-06-03

Snappier navigation and a calmer sync engine.

- Redesigned bottom tab bar with labels and a cleaner selected highlight — switching tabs is now instant and smoother.
- Pull down to refresh your Library, Tools, and Chats; lists also refresh automatically when you switch back to them.
- Fixed excessive iCloud-sync background activity that could loop and drain battery.

### 1.2.0 — 2026-04-25

Fresh look for the reader and library.

- New Liquid Glass tab bar that floats at the bottom, with a smooth morph between tabs.
- Reader gets a minimalist refresh: the chapter-title header is replaced with two floating glass buttons (back and menu), and the bottom reading controls live in a single floating glass pill that includes your page progress.
- Fixed: reading position sometimes appeared to reset when you closed a book and opened it again from the library.
- Fixed: the reader could briefly revert to the default white theme after returning from background.

### 1.1.0 — 2026-04-23

Reworked iCloud sync. Your library, reading progress, highlights, bookmarks, vocabulary, and chats now sync across every device signed into the same iCloud account, updating within seconds.

Your existing library migrates automatically on first launch — nothing to set up.

Also: bug fixes around sync enable/disable on slow iCloud connections, and a new "Remove device" option in iCloud Sync settings to prune old devices you no longer use.

### 1.0 — 2026-04-14

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-01.*