# OneBook vs Readex

The clearest difference is ratings volume: OneBook at 64 against Readex's 5. On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. OneBook sells 2 in-app purchases, starting at $8.00 per month and Readex sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for OneBook against 5.0 for Readex. That said, the two scores are not equally well evidenced: OneBook has 64 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 97% of OneBook's written reviews are positive against 100% of Readex's.

OneBook ships an update weekly, Readex every 4 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | OneBook | Readex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (64 ratings)](https://appshunter.io/ios/app/onebook-language-learning/id6749743594/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/readex/id6757144437/reviews) |
| Number of ratings | **64** | 5 |
| Positive reviews | 97.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Freemium | Freemium |
| Size | 224 MB | 226 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [翊 林](https://appshunter.io/developer/1803147015) | [顺 龙](https://appshunter.io/developer/1864390570) |

## What reviewers say

### OneBook

[App page](https://appshunter.io/ios/app/onebook-language-learning/id6749743594)

This app offers a comprehensive language learning experience by integrating audiobooks, podcasts, and videos. It features AI-powered tools for instant text explanations, word lookup, and subtitle generation, supporting over 60 languages.

**Highlights:** AI Instant Tutor for text explanations, Automatic subtitle generation for audiobooks, Real-person narration for eBooks, Interactive PDF audio books, Efficient word and sentence lookup, Vocabulary level highlighting, Multiple reading modes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OneBook Premium Monthly | $8.00 | per month |
| AI Pack 1000 | $5.00 | one-time |


### Readex

[App page](https://appshunter.io/ios/app/readex/id6757144437)

Enhance your English reading with this tool that integrates vocabulary learning directly into your reading flow. Look up words, save them to a contextualized vocabulary list, and review them with spaced repetition. Customize your reading experience and import your own EPUB and TXT files.

**Highlights:** Tap-to-define word lookup, Contextualized vocabulary list, Spaced repetition for memorization, Customizable reading settings, Import EPUB and TXT files, Chapter and progress management

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 年度会员 | $14.99 | per year |
| 终身会员 | $19.99 | one-time |


## Frequently asked questions

### Is OneBook free?

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

### Is Readex free?

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

### Which has better reviews, OneBook or Readex?

OneBook and Readex are both rated 5.0 out of 5 on the App Store, from 64 and 5 ratings respectively.

### Do OneBook or Readex have ads?

Neither OneBook nor Readex shows ads.

### Which is updated more often, OneBook or Readex?

OneBook ships an update weekly, and Readex every 4 days. Most recently, OneBook was updated on November 5, 2026 and Readex on November 5, 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.*