CHMate: EPUB & CHM Reader

CHMate: EPUB & CHM Reader

Search, annotate, read offline

20 ratings
195 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 29, 2009
  • August 24, 2026

Features

CHMate: EPUB & CHM Reader screenshot #1 for iPhone
CHMate: EPUB & CHM Reader screenshot #2 for iPhone
CHMate: EPUB & CHM Reader screenshot #3 for iPhone
CHMate: EPUB & CHM Reader screenshot #4 for iPhone
CHMate: EPUB & CHM Reader screenshot #5 for iPhone
CHMate: EPUB & CHM Reader screenshot #6 for iPhone
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About

This app offers a robust reading experience for EPUB and CHM eBooks. Organize your library, add bookmarks and notes, and customize your reading environment. Share passages and easily search within your books.

Organize eBooks into collections
Add bookmarks and notes
Customizable fonts and line height
Fast scrolling and pagination
Highlight favorite passages
Built-in search functionality
Share quotes with friends
Show original description

What users say

See all reviews
+1

What's New in CHMate

260821.0

August 24, 2026

New in this update: • Browse and download curated public-domain books directly in CHMate, with real covers and visible download progress • Books appear immediately on your shelf while downloading; pause, resume, retry, or remove them at any time • Improved Chinese and Japanese typography, including vertical layout, ruby spacing, and progress-preserving layout switches • Reworked Find in Page so matches stay visible, result counts remain clear, and the keyboard gets out of the way • A clearer Add Book menu, Recent sorting by default, and many reading and stability fixes

More
1

In-App Purchases

$9.99

CHMate Premium

Upgrade to “CHMate Premium” to manage multiple files.

User reviews

Enabling iCloud sync will result in immediate and irreversible file deletion

I backup the file before turn on the sycn yet it recover nothing

搜索功能很给力

如题

Flexibility with Fonts

It’s a simple app, but what makes a big difference for me is being able to use my own fonts and typography instead of being stuck with the built-in ones.

The only thing I feel is missing is a more visual library where you could browse the covers, either in a list or a gallery.

Very useful app!

I've been using this app for years and I was very happy with the update; I think it's the only application of its kind on Apple Srore; Congratulations to the developer who believes in his work and doesn't give up.

Favorite UI of any reader. Would be nice to have more features

Perhaps I’ll get the paid version at some point, but the UI and the layout of the books that I am reading right now are perfect

Developer apps

User experience

🐞

Reported Bugs

13 issues

App crashes when searching CHM files

Bug

Crashes when using tap-hold for bookmarking

Bug

Highlighting functionality broken after iOS updates

Bug

Notes and bookmarks not saving properly

Bug

Highlights disappear or move between chapters

Bug

App crashes on startup or when opening files

Bug

Table of contents index expansion broken

Bug

Custom fonts blocked after iOS 14.5 update

Bug

Files not accessible via iCloud or Dropbox

Bug

Missing icons after updates

Bug

Images display as half-dark or missing

Bug

Text formatting changes not visible without page reload

Bug

First line spacing issues

Bug

Requested Features

12 requests

Dark mode and additional color themes (Sepia)

Feature

Book cover display instead of text-only library view

Feature

PDF support

Feature

Text-to-speech functionality

Feature

Better pagination options

Feature

iPad Pro resolution support

Feature

iOS multi-window support

Feature

Better bookmark functionality

Feature

Separate highlighting and annotation tools

Feature

Support for Cyrillic and Arabic text encoding

Feature

Collection/folder organization for multiple files

Feature

Zip file support for documentation sets

Feature

FAQ

What file formats does CHMate support?

CHMate is designed to read eBooks in EPUB and CHM formats. These are common formats for digital books and documentation.

How can I organize my books with CHMate?

You can organize your CHM documents into personal collections that sync across your devices via iCloud. This helps keep your library tidy and accessible.

Is CHMate free to use?

The base version of CHMate is free, but it allows only one book at a time. For managing and reading multiple books simultaneously, you will need to purchase 'CHMate+' via an in-app purchase or the standalone app.

Can I add notes or highlights to my books?

Yes, CHMate allows you to add bookmarks and notes to your favorite passages. You can also highlight sections and keep your current page updated across devices using iCloud.

How do I add books to CHMate?

You can add files to CHMate using the desktop web browser or through iTunes File Sharing. This provides flexibility in how you transfer your eBooks to the app.