# ChmPlus Pro vs TWB学术电子书

The clearest difference is price: TWB学术电子书 at Free against ChmPlus Pro's $6.99. TWB学术电子书 also leads on rating (5.0 vs 2.7). ChmPlus Pro's advantage is update cadence (every 9 days vs every 2 months) and ratings volume (9 vs 1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

TWB学术电子书 is free to download; ChmPlus Pro costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TWB学术电子书 holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: ChmPlus Pro has 9 ratings behind it against 1, so its average is the more settled of the two.

ChmPlus Pro ships an update every 9 days, TWB学术电子书 every 2 months. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ChmPlus Pro | TWB学术电子书 |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [2.7 (9 ratings)](https://appshunter.io/ios/app/chmplus-pro-chmepub-reader/id441521818/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/twb/id1433879351/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 10 MB | 77 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [兰桂 吴](https://appshunter.io/developer/433671404) | [Indexi Inc.](https://appshunter.io/developer/1433878840) |

## What reviewers say

### ChmPlus Pro

[App page](https://appshunter.io/ios/app/chmplus-pro-chmepub-reader/id441521818)

This app allows you to read and manage various document formats, including CHM and EPUB ebooks. It offers features like highlighting, bookmarking, searching, and file transfer. Secure your documents with a passcode lock and organize your files with ease.

**Highlights:** CHM/EPUB document reading, Highlight, bookmark, and annotate, Document-wide search, Wi-Fi and iTunes file transfer, Passcode lock for files, Support for multiple file types, Create and edit text documents

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

**In-app purchases:** none

**What reviewers like**

- 👍 Generally good for CHM files
- 🚀 Fast opening of files
- 🔍 Powerful search function
- 📂 Good file organization
- ✨ Clean interface

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- 🐛 Highlighting issues (not working, disappearing)
- 🐛 Displaying Chinese characters as garbled text (亂碼)
- 🐛 Slow copy/paste and search response
- 🐛 Some CHM files not fully opening

**Reported bugs**

- Chinese characters displayed as garbled text (亂碼)
- Search feature broken for numbers (recent)
- Copying is slow
- App crashes when searching
- Editing text feature removed after update

**Requested features**

- Adjustable font size
- PDF left-right page turning
- EPUB file support
- Expand/collapse table of contents
- Adapt to full-screen displays


### TWB学术电子书

[App page](https://appshunter.io/ios/app/twb/id1433879351)

Access a comprehensive database of Taiwanese academic books across all disciplines. Enjoy a convenient cloud reading experience with online or offline access. Features include simplified Chinese search and faceted search results.

**Highlights:** Full-discipline Taiwanese academic books, Simplified Chinese search support, Faceted search results, Offline reading capability, Customizable reading reminders

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ChmPlus Pro free?

ChmPlus Pro costs $6.99, with no in-app purchases.

### Is TWB学术电子书 free?

TWB学术电子书 is free to download, with no in-app purchases.

### Which has better reviews, ChmPlus Pro or TWB学术电子书?

TWB学术电子书 is rated higher. ChmPlus Pro averages 2.7 out of 5 from 9 ratings, while TWB学术电子书 averages 5.0 from 1 ratings.

### Do ChmPlus Pro or TWB学术电子书 have ads?

Neither ChmPlus Pro nor TWB学术电子书 shows ads.

### Which is updated more often, ChmPlus Pro or TWB学术电子书?

ChmPlus Pro ships an update every 9 days, and TWB学术电子书 every 2 months. Most recently, ChmPlus Pro was updated on October 20, 2026 and TWB学术电子书 on October 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.*