ChmPlus Reader (CHM+ Reader) is a feature-rich CHM (Microsoft Compiled HTML Help) document / ebook reader for iPad, iPhone and iPod touch. ChmPlus Reader is currently the best CHM reader available for iOS.

***** ChmPlus Reader is now also available for Mac! (search for "chmplus" on the Mac App Store) *****

ChmPlus Reader now supports highlight / annotation, bookmark and search (find on page & document-wide search).

CHM/ePub Document Support:
- Highlight / annotation
- Bookmark
- Search (find on page & document-wide search)
- Open CHM files instantly (even with huge files)
- Supports CHM files in different languages
- Supports pinch to zoom
- Navigate through table of contents
- Supports full screen mode
- Swipe to turn page
- Supports auto rotation and orientation lock
- Support CHM document that contains .mht pages
- Long press on an image to:
1) save the image to photo album
2) copy the image to clipboard (and paste it into your email)
- night mode (white text on black background)
- Built-in web browser for viewing images and external links

File Management:
- Transfer files via Wi-Fi (FTP & HTTP) / iTunes File Sharing
- Create/copy/move/rename/delete files and folders
- Support opening document with other applications
- Import document from other applications
- Import document from Email
- Edit existing text documents
- Send multiple Email attachments
- Create .zip archives
- Save image to Photos

Supported File Types:
- .chm (Microsoft Compiled HTML Help)
- .epub (electronic publication)
- MS Office - .doc, .ppt., .xls, .docx, .xlsx, .pptx
- iWork '08/'09
- PDF, HTML, RTF, .mht, Safari webarchives and text files
- .zip, .rar, .7z,.gz, .tar file types
- High resolution images
- Audio and video

Note: support for .mht format is experimental, the App might not be able to open large .mht files.


What’s New

Version 4.0

This app has been updated by Apple to use the latest Apple signing certificate.

• Optimized for iOS 8
• Improved highlighting stability
• Added passcode support

Ratings and Reviews

3.3 out of 5
3 Ratings

3 Ratings

bkp180 ,

Good, but needs updated

I like this app, but it often doesn't save my highlights and annotations. There are also glitches when I highlight, sometimes it wont allow me to switch to a different color without switching the color of my previous highlights. I would consider upgrading if I was confident the bugs were fixed. Some other features that would be nice are additional options such as underlining and ability to have changes made on 1 apple device to update on others that also have the CHM app installed.

BrilliantMed ,

Works. That's what's important

Simple app. Works well. Dropbox recognized it and sent a 70MB CHM format file to it without a problem. The file opened quickly and properly. Images and text are displayed correctly; all formatting is just like on my computer.

Free version allows highlighting in different colors and annotation. Not sure if these are embedded into the CHM file or kept elsewhere.

One complaint: the Table Of Contents button in the upper right corner of the window appeared grayed out when I first opened my CHM file. I thought the program was broken and I could only view the first page. It isn't broken; tap the grayed out TOC button and it opens correctly. It handles the nested CHM Table of Contents filing system well too. Nice app!

Free version has ads at the bottom of the screen. They appear to be text only, though, so it hasn't been too annoying. $7 to get rid of them is a bit steep.

Trooperzzzz ,

Handy tool

Lite version capable on loading only 1chm file to give you a taste of the tool. File uploading is done by the app creating a server and entering the ip address of the server on the co outer to upload the file and hence it's done wirelessly. I would have prefered if the life version gave the option for at least 2-3 files to try in real time.


Coral Wu
8.3 MB

Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Simplified Chinese, Traditional Chinese

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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