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 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

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

Ratings and Reviews

3 out of 5

5 Ratings

5 Ratings

Best reader app out there.


While it is free of charge, this gem of an app lets you create, open and read .chm files in addition to PDFs and the like. There are more features like the server that it sets up on your device that you can upload to from a web page (the http) or through the ftp option. It integrates well into the iOS operating system too. Thanks a lot, great app.

Worst up ever


I have a bunch of documents and every time I rename one and then I try to open it, it says: Unsupported File Type CHM+ doesn't recognize this fyle ripe. And the original file is gone!

Unsupported file type ! .Chm


So Microsoft flight sim X .chm file wouldn't open its there Sdk help file. At least the app was free. Guess you get what you pay for.


Coral Wu
7.6 MB
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Simplified Chinese, Traditional Chinese
Age Rating
Rated 4+
© 2012-2015


  • Family Sharing

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

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