Comparison

ChmPlus Pro vs Epub Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ChmPlus Pro

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
Read full description

ChmPlus Reader (CHM+) is a feature-rich CHM (Microsoft Compiled HTML Help) document/ebook reader for iPhone/iPad. ChmPlus Reader now supports passcode lock! CHM/EPUB Document Support: • Highlight / bookmark / annotation • 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 • Supports auto rotation and orientation lock • 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) File Management: • Transfer files via Wi-Fi (FTP & HTTP) / iTunes File Sharing • Create/copy/move/rename/delete files and folders • Passcode lock • Support opening document with other applications • Import documents from other applications • Create/edit text documents • Send multiple Email attachments • Create .zip archives • Save image to Photos • Browse and manage remote files (FTP/FTPS, SFTP and WebDAV) Supported File Types: • .chm (Microsoft Compiled HTML Help) • .epub (electronic publication) • MS Office - .doc, .ppt., .xls, .docx, .xlsx, .pptx • iWork '08/'09 (Pages, Numbers, Keynote) • PDF, HTML, RTF, .mht, Safari webarchives and text files • .zip, .rar, .7z, .bz2, .gz, .tar and various other archive file types • High resolution images • Audio and video ==SUPPORT== - https://langui.net/chmplus/

About

Epub Reader

This app offers a seamless reading experience for various ebook formats including EPUB, PDF, and CHM. It supports multiple compression formats and provides features like table of contents, note-taking, and bookmarking. Customize your reading with adjustable font sizes.

Highlights
  • Supports EPUB, PDF, CHM, RTF formats
  • Opens compressed files (ZIP, RAR, 7Zip)
  • Table of Contents navigation
  • Note-taking functionality
  • Bookmark management
  • Customizable font size
Features
Currently charting
Read full description

Epub Reader: Ultimate Ebook & Comic Viewer Experience seamless reading with a powerful, all-in-one document viewer designed for iOS. Now fully compatible with Kindle and Amazon ebook formats! All-in-One Format Support • Kindle Formats: MOBI, AZW, AZW3, AZW4, PRC • Ebooks & Docs: EPUB, PDF, CHM, RTF • Comics & Archives: CBZ, CBR, ZIP, RAR, 7Z, GZIP, TAR Key Features: • Smart Navigation: Effortlessly browse and skip chapters with the interactive Table of Contents. • Personalized Reading: Highlight text, take inline notes, and save your favorite pages with bookmarks. • Fully Customizable: Adjust font sizes and layouts to read comfortably, day or night. • Easy File Transfer: Instantly import books via Wi-Fi (desktop browser) or iTunes File Sharing. #Permanent professional version: * Make a one-time purchase and resume purchases anytime, anywhere. #Annual professional version: * Annual auto-renewable subscription, automatic renewal upon expiration. * Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Account Settings after purchase. Privacy Policy: https://junjie-5cfc2.web.app/epubreader/privacypolicy.html Terms of Use: https://junjie-5cfc2.web.app/epubreader/terms.html Contact us: marryapps@163.com

Screenshots

ChmPlus Pro4 screens
Epub Reader4 screens

Verdict

The call

The clearest difference is price: Epub Reader at Free against ChmPlus Pro's $6.99. Epub Reader also leads on rating (4.5 vs 2.7) and ratings volume (11K vs 9). ChmPlus Pro's advantage is in-app purchases (none vs 4) and ads (none vs shown). On review sentiment, update cadence and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Epub Reader is free to download; ChmPlus Pro costs $6.99 up front. Epub Reader sells 4 in-app purchases, starting at $3.99 per year. ChmPlus Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Epub Reader holds the better App Store score, 4.5 against 2.7. That said, the two scores are not equally well evidenced: Epub Reader has 11K ratings behind it against 9, so its average is the more settled of the two. Written reviews split almost evenly too, at 54% and 55% positive.

UpkeepUpdate frequency

ChmPlus Pro ships an update every 9 days, Epub Reader every 11 days. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 3 level
ChmPlus Pro versus Epub Reader: the parameters behind the verdict, then further details
ParameterChmPlus ProEpub Reader
Price$6.99Free — better
Rating2.7 (9 ratings)4.5 (11K ratings) — better
Positive reviews54.5% of reviews55.3% of reviews — better
Number of ratings911K — better
Update frequencyEvery 9 days — betterEvery 11 days
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank—#136 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size10 MB70 MB
Age rating4+4+
Developer兰桂 吴俐 马

Customer experience

ChmPlus Pro

All ratings9 ratings
Positive33.3%
Neutral11.1%
Negative55.6%
Written reviews123 reviews
Positive54.5%
Neutral15.4%
Negative30.1%

Epub Reader

All ratings11,177 ratings
Positive88.3%
Neutral3.6%
Negative8.0%
Written reviews1,075 reviews
Positive55.3%
Neutral10.4%
Negative34.3%

User reviews

ChmPlus Pro

From 9 App Store ratings

What we love

  • 👍 Generally good for CHM files
  • 🚀 Fast opening of files
  • 🔍 Powerful search function
  • 📂 Good file organization
  • ✨ Clean interface

Room to improve

  • 🐛 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

Epub Reader

From 11K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Fast and responsive
  • 💡 Convenient file transfer via WiFi
  • 🤩 Great for casual reading

Room to improve

  • 🐛 Loses bookmarks and reading progress
  • 🔍 Lacks search functionality
  • 🌗 No dark mode option
  • 📏 Limited customization options
  • 💤 Doesn't remember last read position

Bugs and requests

ChmPlus Pro

Reported bugs

33 issues
  • 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
Show 28 more
  • Some CHM files cannot be fully opened
  • Highlighting not working or disappearing
  • PDF navigation issues
  • Page turning is laggy
  • App locks up or freezes
  • Black screen or screen jumping issues
  • Subdirectories cannot be opened
  • MHT file errors
  • Frequent crashes with large PDFs or highlighting
  • Table of contents not permanently displayed
  • Cannot display secondary windows
  • Slow highlighting/selection
  • Swipe to turn page not working
  • Text smudging after zooming on iOS 7
  • Highlighting not saving
  • App crashes when defining words
  • App jumps to the beginning of text
  • Live search on page is too slow
  • Highlight option not working properly
  • Notes disappear after reopening
  • Chapters change spontaneously
  • Cannot delete folders
  • App freezes when using highlighting
  • PDF is read-only
  • Pixelated icons on new iPads
  • No function for CHM-Files (no content shown)
  • Search function not working for CHM files
  • Unhighlight words after search

Requested features

33 requests
  • Adjustable font size
  • PDF left-right page turning
  • EPUB file support
  • Expand/collapse table of contents
  • Adapt to full-screen displays
Show 28 more
  • Highlighting for PDF and EPUB
  • Freehand annotation/drawing
  • Split screen for notes
  • Add folders via iTunes library
  • Dark mode/night viewing
  • Private lock for files
  • Support for .rar and .zip files
  • Reading .cbr files
  • Better iOS 7 adaptation
  • Continuous scrolling
  • Font selection and line spacing adjustments
  • Copy annotations to PC
  • Export feature
  • Open .rar and .zip
  • Read .cbr
  • Develop for iOS 7
  • Block orientation defective
  • Font selection
  • No refund option
  • Move files within folders
  • Better UI/shelf-like appearance
  • Add .mobi file support
  • Built-in browser
  • Unhighlight words after search
  • Add private lock
  • Search all over a document
  • Add folder support on iTunes library
  • Inverse background mode for night time viewing

Epub Reader

Reported bugs

3 issues
  • Crashes when opening certain files
  • Distorts images in some ebooks
  • Fails to open ePub files consistently

Requested features

5 requests
  • Add dark mode
  • Improve bookmark and progress tracking
  • Implement search feature
  • Increase customization options
  • Allow variable screen timeout

In-app purchases

None

ChmPlus Pro

No in-app purchases

4 purchases

Epub Reader

Subscriptions1
  • Annual professional version$3.991 Year
One-time3
  • Remove Ads$0.99
  • Passcode Lock$0.99
  • Pro Version$5.99

Questions

Is ChmPlus Pro free?
ChmPlus Pro costs $6.99, with no in-app purchases.
Is Epub Reader free?
Epub Reader is free to download, with in-app purchases available.
Which has better reviews, ChmPlus Pro or Epub Reader?
Epub Reader is rated higher. ChmPlus Pro averages 2.7 out of 5 from 9 ratings, while Epub Reader averages 4.5 from 11K ratings.
Do ChmPlus Pro or Epub Reader have ads?
Epub Reader shows ads; ChmPlus Pro does not.
Which is updated more often, ChmPlus Pro or Epub Reader?
ChmPlus Pro ships an update every 9 days, and Epub Reader every 11 days. Most recently, ChmPlus Pro was updated on September 25, 2026 and Epub Reader on September 24, 2026.

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