# ChmPlus Pro vs ReadingUp

The clearest difference is in-app purchases: ChmPlus Pro at none against ReadingUp's 3. ChmPlus Pro also leads on iOS requirement (11.0 vs 17.6). ReadingUp's advantage is review sentiment (83% vs 54%) and price ($1.99 vs $6.99). On ads and device support there is nothing between them.

ChmPlus Pro costs $6.99 and ReadingUp $1.99 up front. ReadingUp sells 3 in-app purchases, starting at $19.99 per month. ChmPlus Pro asks for nothing beyond the download.

ChmPlus Pro ships an update every 9 days, ReadingUp every 2 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ChmPlus Pro | ReadingUp |
| --- | --- | --- |
| Price | $6.99 | **$1.99** |
| Rating | **[2.7 (9 ratings)](https://appshunter.io/ios/app/chmplus-pro-chmepub-reader/id441521818/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 54.5% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 10 MB | 69 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [兰桂 吴](https://appshunter.io/developer/433671404) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## 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


### ReadingUp

[App page](https://appshunter.io/ios/app/readingup/id6757276895)

This app offers a distraction-free e-book reading experience with support for multiple file formats. It features iCloud sync for cross-device progress, customizable reading settings, and tools for organizing notes and highlights. Enjoy a pure reading journey without ads.

**Highlights:** Supports EPUB, TXT, MOBI, WORD, PDF, iCloud sync for cross-device reading, Smart highlighting and note organization, Customizable fonts, backgrounds, and page-turning, Immersive mode for focused reading, Export notes as PDF, TXT, Markdown

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadingUp  Premium - monthly | $19.99 | per month |
| ReadingUp Premium - yearly | $49.99 | per year |
| ReadingUp Premium- lifetime | $89.99 | one-time |


## Frequently asked questions

### Is ChmPlus Pro free?

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

### Is ReadingUp free?

ReadingUp costs $1.99, and also offers in-app purchases.

### Do ChmPlus Pro or ReadingUp have ads?

Neither ChmPlus Pro nor ReadingUp shows ads.

### Which is updated more often, ChmPlus Pro or ReadingUp?

ChmPlus Pro ships an update every 9 days, and ReadingUp every 2 days. Most recently, ChmPlus Pro was updated on October 12, 2026 and ReadingUp on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*