# OneBook vs 萤火搜题

The clearest difference is in-app purchases: 萤火搜题 at none against OneBook's 2. OneBook's advantage is update cadence (weekly vs every 2 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. OneBook sells 2 in-app purchases, starting at $8.00 per month. 萤火搜题 asks for nothing beyond the download.

OneBook ships an update weekly, 萤火搜题 every 2 weeks. The most recent releases landed on November 8, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | OneBook | 萤火搜题 |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 229 MB | 21 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [翊 林](https://appshunter.io/developer/1803147015) | [泰宇 卢](https://appshunter.io/developer/6797016648) |

## 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, vocabulary highlighting, and subtitle generation, supporting over 60 languages.

**Highlights:** AI Instant Tutor for text explanations, Auto-generated synchronized subtitles for audiobooks, Real-person narration for eBooks, Interactive PDF audio books, Efficient word and sentence lookup, Vocabulary level highlighting, Multiple reading modes including ADHD Bionic Reading

**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 |


### 萤火搜题

[App page](https://appshunter.io/ios/app/id6806470393)

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

**In-app purchases:** none


## Frequently asked questions

### Is OneBook free?

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

### Is 萤火搜题 free?

萤火搜题 is free to download, with no in-app purchases.

### Do OneBook or 萤火搜题 have ads?

Neither OneBook nor 萤火搜题 shows ads.

### Which is updated more often, OneBook or 萤火搜题?

OneBook ships an update weekly, and 萤火搜题 every 2 weeks. Most recently, OneBook was updated on November 8, 2026 and 萤火搜题 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.*