# Reader AI vs Compendium Audiobooks

The clearest difference is review sentiment: Compendium Audiobooks at 100% against Reader AI's 0%. Compendium Audiobooks also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 7). On price, update cadence and device support there is nothing between them.

Both are free to download. Reader AI sells 7 in-app purchases, starting at $6.99 per month. Compendium Audiobooks asks for nothing beyond the download.

Compendium Audiobooks holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Compendium Audiobooks has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Reader AI's written reviews are positive against 100% of Compendium Audiobooks's.

Reader AI ships an update every 5 days, Compendium Audiobooks weekly. Both last shipped on November 6, 2026.

## The numbers

| Metric | Reader AI | Compendium Audiobooks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/reader-ai-read-and-learn/id6806736317/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/compendium-audiobooks/id6807578229/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 85 MB | 8 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [江 刘](https://appshunter.io/developer/1672554088) | [Compendium LLC](https://appshunter.io/developer/6807578231) |

## What reviewers say

### Reader AI

[App page](https://appshunter.io/ios/app/reader-ai-read-and-learn/id6806736317)

Enhance your reading and language learning experience by importing books and articles. Get AI-powered explanations, translations, and summaries. Listen to narrated text and organize your library with customizable features.

**Highlights:** AI-powered word and sentence explanations, In-context translation, Text-to-speech narration, Import EPUB, TXT, MOBI, AZW3, PDF, Website and blog following, Customizable reading layout, PDF annotation

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Quarterly | $19.99 | per 3 months |
| Yearly | $69.99 | per year |
| 100 points | $9.99 | one-time |
| No bookshelf limit | $9.99 | one-time |
| 300 points | $29.99 | one-time |
| 1000 points | $89.99 | one-time |


### Compendium Audiobooks

[App page](https://appshunter.io/ios/app/compendium-audiobooks/id6807578229)

Access a vast library of classic literature and philosophy as audiobooks. Enjoy chapter-by-chapter playback with adjustable speed and background listening. Start with free first chapters and unlock more content with an account.

**Highlights:** 690+ audiobooks library, Chapter-by-chapter playback, Adjustable playback speed, Background audio playback, Save progress across sessions, No sign-up required for free chapters

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

**In-app purchases:** none


## Frequently asked questions

### Is Reader AI free?

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

### Is Compendium Audiobooks free?

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

### Which has better reviews, Reader AI or Compendium Audiobooks?

Compendium Audiobooks is rated higher. Reader AI averages 2.0 out of 5 from 1 ratings, while Compendium Audiobooks averages 5.0 from 5 ratings.

### Do Reader AI or Compendium Audiobooks have ads?

Reader AI shows ads; Compendium Audiobooks does not.

### Which is updated more often, Reader AI or Compendium Audiobooks?

Reader AI ships an update every 5 days, and Compendium Audiobooks weekly. Most recently, Reader AI was updated on November 6, 2026 and Compendium Audiobooks on November 6, 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.*