Comparison

ChmPlus Pro vs ReadingUp

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

ReadingUp

This app offers a distraction-free e-book reading experience with support for multiple file formats. It features iCloud sync for cross-device progress, customizable reading settings, and tools for organizing notes and highlights. Enjoy a pure reading journey without ads.

Highlights
  • Supports EPUB, TXT, MOBI, WORD, PDF
  • iCloud sync for cross-device reading
  • Smart highlighting and note organization
  • Customizable fonts, backgrounds, and page-turning
  • Immersive mode for focused reading
  • Export notes as PDF, TXT, Markdown
Features
Read full description

ReadingUp is a dedicated e-book reader designed for users who seek a pure reading experience.  We offer practical and concise features, supporting EPUB、TXT、MOBI、HTML、 WORD、and PDF formats, and seamless cross-device reading through iCloud sync.  Whether for learning, work, or leisure, ReadingUp meets your needs and allows you to focus on the content itself. Core Features Supports reading EPUB、TXT、MOBI、WORD、 and PDF files to meet your diverse reading needs. Highlight selected text automatically and add it to personal notes with one tap for easy organization and review. Display book covers on your bookshelf for a clear view of your collection. Export notes as PDF, TXT, and Markdown for easy sharing and archiving. Infinite scrolling for smooth cross-chapter reading. Optimized bottom spacing to reduce accidental touches and enhance reading comfort. Support for left and right page-turning, with the top menu bar hidden under the dynamic island to avoid disturbing your reading. Tap the table of contents to automatically enter immersive mode and focus on the content. Realistic page-turning sounds to enhance the reading experience. Simulated page-turning effects for EPUB, making e-book reading more vivid. Custom book categories for easy management of your bookshelf. Share books with one tap to exchange reading insights with friends. Receive books via AirDrop and save them directly to your bookshelf without complicated steps. Why Choose ReadingUp? No ads, no distractions, just a pure reading experience. iCloud sync keeps your books, notes, and reading progress up to date across all devices, allowing you to continue reading anytime, anywhere. Highly customizable: fonts, backgrounds, page-turning methods, spacing, and more are all under your control. Privacy-first: your data is stored in your iCloud, with no login required, ensuring security and reliability. Immersive mode, smart highlighting, and note organization make reading more efficient. Ideal For Users who seek a pure reading experience Students and professionals who need cross-device syncing Readers who enjoy organizing notes and knowledge E-book enthusiasts who want to customize their reading environment Download ReadingUp and start your journey of boundless reading. —Subscription Plans & Auto-Renewal Info Flexible Subscription Plans for Every Need! Choose the perfect plan for your goals with our diverse subscription options: * 1 Month: Ideal for project-based users * 1 Year: Best value for committed users * Lifetime: One-time purchase, forever access —Auto-Renewal Details: * Payment will be charged to your iTunes Account at confirmation of purchase. * Subscriptions are billed monthly, or annually based on your chosen plan. * Subscriptions auto-renew within 24 hours before the current period ends (except Lifetime). * Renewal charges will be processed within 24 hours before the end of the current period, with the cost depending on your selected plan. * Manage subscriptions or turn off auto-renewal anytime via your Apple ID Account Settings. —Lifetime Membership Perks: * Pay once, unlock all features forever—no renewals, no hassle! Note: * Manage subscriptions at: Settings > [Your Name] > Subscriptions — Privacy Policy please visit: https://docs.qq.com/doc/DREt1SXJkbG9JYUFT * **Terms of use (EULA): * https://docs.qq.com/doc/DREdKR2ZwYUJaa1hr * **Terms of apple please visit: * https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ * Questions? Get Coupon Discount code?Contact us at: https://x.com/createeem

Screenshots

ChmPlus Pro4 screens
ReadingUp4 screens

Verdict

The call

The clearest difference is in-app purchases: ChmPlus Pro at none against ReadingUp's 3. ChmPlus Pro also leads on iOS requirement (11.0 vs 17.6). ReadingUp's advantage is review sentiment (83% vs 54%) and price ($1.99 vs $6.99). On ads 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

ChmPlus Pro costs $6.99 and ReadingUp $1.99 up front. ReadingUp sells 3 in-app purchases, starting at $19.99 per month. ChmPlus Pro asks for nothing beyond the download.

UpkeepUpdate frequency

ChmPlus Pro ships an update every 9 days, ReadingUp every 2 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

Scorecard6 real differences · 4 level
ChmPlus Pro versus ReadingUp: the parameters behind the verdict, then further details
ParameterChmPlus ProReadingUp
Price$6.99$1.99 — better
Rating2.7 (9 ratings) — better—
Positive reviews54.5% of reviews83.3% of reviews — better
Number of ratings9 — better—
Update frequencyEvery 9 daysEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.6
Further details — not scored
Size10 MB69 MB
Age rating4+4+
Developer兰桂 吴乐祥 胡

Customer experience

ChmPlus Pro

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

ReadingUp

Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

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

ReadingUp

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ChmPlus Pro

No in-app purchases

3 purchases

ReadingUp

Subscriptions2
  • ReadingUp Premium - monthly$19.991 Month
  • ReadingUp Premium - yearly$49.991 Year
One-time1
  • ReadingUp Premium- lifetime$89.99

Questions

Is ChmPlus Pro free?
ChmPlus Pro costs $6.99, with no in-app purchases.
Is ReadingUp free?
ReadingUp costs $1.99, and also offers in-app purchases.
Do ChmPlus Pro or ReadingUp have ads?
Neither ChmPlus Pro nor ReadingUp shows ads.
Which is updated more often, ChmPlus Pro or ReadingUp?
ChmPlus Pro ships an update every 9 days, and ReadingUp every 2 days. Most recently, ChmPlus Pro was updated on October 12, 2026 and ReadingUp on October 1, 2026.

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