# Quill vs Ghostreader AI

The clearest difference is in-app purchases: Quill at none against Ghostreader AI's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Ghostreader AI sells 1 in-app purchase, starting at $6.99 per month. Quill asks for nothing beyond the download.

Quill ships an update every 9 days, Ghostreader AI every 10 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Quill | Ghostreader AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quill-ai-book-reader/id6762075206/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 days |
| Monetization | Free | — |
| Size | 20 MB | 9 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [思涵 岳](https://appshunter.io/developer/1885417868) | [lauren brendle](https://appshunter.io/developer/6780510752) |

## 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


### Ghostreader AI

[App page](https://appshunter.io/ios/app/ghostreader-ai/id6780510750)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Avid Reader | $6.99 | per month |


## Frequently asked questions

### Is Quill free?

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

### Is Ghostreader AI free?

Ghostreader AI is free to download, with in-app purchases available.

### Do Quill or Ghostreader AI have ads?

Neither Quill nor Ghostreader AI shows ads.

### Which is updated more often, Quill or Ghostreader AI?

Quill ships an update every 9 days, and Ghostreader AI every 10 days. Most recently, Quill was updated on October 6, 2026 and Ghostreader AI on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*