Chm Reader X

3.9
2.26K reviews
100K+
Downloads
Content rating
Everyone
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About this app

Note: The latest fix doesn't work for Android below version 11. so it's removed from play store for those devices, for those devices, you can only get the old version from third party store by searching chmread.apk. version: V2.1.160802

FEATURES
=========
A light weight yet faster CHM eBook Reader for tablet and phone with following features:

1. Better performances using highly optimized CHM parsing engine. Especially it can open large CHM file (>100M) file much faster than other readers.
2. Better compatibility with ill-formatted CHM document. It can open some file which couldn't be opened by other readers.
3. Content tree view support.
4. Search function
5. Full screen support
6. Keep reading state such as page postion, zoom level between different read sessions.
7. Support CHM, HTML,MHT,Text, Image files.
8. Use volume down/up to turn pages
9. Associated with CHM/HTML file in the file manager. (Only work with certain file managers, e.g. OI File manager)
10. Bookmark support.
11. Support language encoding setting in case the CHM file can't display charset properly.
12. Support low light mode.
13. Support embedded PDF files.
14. Support embedded MHT files ((limited support, fix in progress).
15. Support fast scroll. Just drag the scroll bar to fast scroll.
16. Tap top and bottom of page to navigate.

KNOWN ISSUES ON KIT KAT
=======================
In Kit Kat, due to Google changed the webview engine with Chrome which has many bugs and compatibility issues. Some of features is not working. I'm working to find work around of those issues.

1. Reflow function is broken for some CHM file. So you may need to scroll left/right to view the pages. After latest upgrade 4.4.2, seems Google partially fixed this issue. So some of the file reflow works again, but not all.

2. Set the zoom level function is not working properly, so if you changed the zoom level, when switch to different page, the zoom level will be reset. After 4.4.2 upgrade, seems Google is trying to fix this issue. so now the zoom level is persisted. But I notice a new issue, for certain file, once zoom in, you can't zoom out to original level, the work around, is to "clear history" from scratch.

PERMISSION REQUIRED
====================
Internet Access Permission: to open external link to internet embedded in some CHM files.

FEEDBACKS AND ISSUES
=====================
Please help to leave a rating if you like it.

Please make sure to send me a email if there's any issue, I'll try to find a solution asap. Just leaving a comments on Play or just send a message on crash report won't help as I have no way to communicate back so I can't know the details for trouble shooting.

FAQs
====
1. Can't see the menu buttons to enable all the functions.

In Android 4.0 and above, the menu button is a list of 3 vertical dots on the right-bottom side of the screen.

2 when clicking link on the content page, It has lag in response in certain devices.

As content page is an HTML page, when you click a link, the browser sometime will treat it as pan event instead of click event if you hold you finger a little bit longer on screen, in that case browser won't open the link. So the solution is make sure to click very briefly, don't touch screen for longer time.
Updated on
Mar 6, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
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Ratings and reviews

4.1
1.89K reviews
Dr P Singh
July 16, 2020
Unable to use reflow of text in any mobile with Android versions 7,1 and above. Besides this app developers do not respond to addres the issue. We are trying to get solutions. Otherwise it was working fine with lower versions of Android 6.1 and below. I can give 5 star for that but for Android version app developers should update it.
24 people found this review helpful
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Charly Ricafort
May 5, 2025
CHM Reader X: CSS-true rendering, per-file bookmarks, intuitive touch/volume scrolling, and remembers my customized font size! Suggestion: Hyphenation Option Pls enhance readability by creating hyphenation option like "@Voice Aloud Reader" with "Page look" settings (via a "T+/-" icon and the "TEXT" tab). It intelligently splits long one word (many letters) at line breaks by hyphenation, improving layout on phones (portrait), minimizing large gaps between words, and boosting user experience.
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A Google user
March 29, 2019
Improve your searching function. The app is small, reads fast and searches fast too, only 25 MB in RAM reading a 20 MB .chm. Needs more customization options for color, background and use of more fonts
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App support

About the developer
Jianwu Chen
jianwu@gmail.com
15422 Warwick Rd San Jose, CA 95124-5555 United States
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