# OneBook vs Yidou Words

OneBook and Yidou Words are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. OneBook sells 2 in-app purchases, starting at $8.00 per month and Yidou Words sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OneBook | Yidou Words |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (64 ratings)](https://appshunter.io/ios/app/onebook-language-learning/id6749743594/reviews)** | — |
| Number of ratings | **64** | — |
| Positive reviews | 97.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Freemium | — |
| Size | 224 MB | 156 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [翊 林](https://appshunter.io/developer/1803147015) | [艳 常](https://appshunter.io/developer/1882109633) |

## 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 |


### Yidou Words

[App page](https://appshunter.io/ios/app/yidou-words/id6759995415)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一兜英语 Pro | $0.99 | per month |
| 300 AI 点数 | $0.99 | one-time |
| 一兜英语Pro永久版 | $2.99 | one-time |
| 1000 AI 点数 | $2.99 | one-time |
| 3000 AI 点数 | $4.99 | one-time |


## Frequently asked questions

### Is OneBook free?

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

### Is Yidou Words free?

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

### Do OneBook or Yidou Words have ads?

Neither OneBook nor Yidou Words shows ads.

### Which is updated more often, OneBook or Yidou Words?

OneBook ships an update weekly, and Yidou Words weekly. Most recently, OneBook was updated on November 6, 2026 and Yidou Words 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.*