36
BU Score
Emerging
ChmPlus Pro: CHM/EPUB Reader
✍️ bumetric analysis
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ChmPlus Pro: CHM/EPUB Reader is an iOS app from 兰桂 吴 in the Food & Drink category, currently rated 2.7★ across 9 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 36: Emerging (early traction worth watching). For a Food & Drink app, that means early traction worth watching.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 9 of 9 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Below-average rating (2.7★)METRIC | −$1,500 | |
| Mature app (14y old)METRIC | +$1,500 | |
| slowREVIEW | −$1,200 | |
| support teamREVIEW | +$900 | |
| Pre-traction phase (9 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 10 MB🔞 4+📱 iOS 11.0+🔖 v5.2.1🔄 updated 2y ago🌐 EN, ZH, ZH📂 Food & Drink💰 Paid🚀 Launched 2011 (14y old)
📝 About this app
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/
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/
🆕 What's New · v5.2.1
• Fix the CHM/EPUB viewer search button issue (macOS Sonoma)
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- ChmPlus Pro: CHM/EPUB Reader
- Developer
- 兰桂 吴
- Bundle ID
- net.langui.ChmPlus
- App Store URL
- Open in App Store
- Category
- Food & Drink
- Content rating
- 4+
- Languages
- EN, ZH, ZH
Company
- Website
- langui.net
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $7.2K/mo
- Top-grossing rank
- Outside top 100 in US Food & Drink
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
⭐Recent App Store Reviews49 latest · avg 3.29★ · 30.6% 5★ · 18.4% 1★
5★15 (31%)
4★10 (20%)
3★7 (14%)
2★8 (16%)
1★9 (18%)
+0 ratings/week
Praise: great ×6 best ×6 excellent ×4 perfect ×3 love ×2Complaints: crash ×2 bug ×2 refund ×1 broken ×1
Top positive
★★★★★ I personally think that CHM + is a good reading software. Worth buying!
I personally think that CHM + is a good reading software. Worth buying!…
★★★★★ cool
it awesome,like it…
Top negative
★☆☆☆☆ Unable to highlight
Unable to highlight .please provide a fix…
★☆☆☆☆ Locks up
Just bought it and it locks up…
📈Ratings growth9 ratings+-10% lifetimeShow 3-year history estimate ▾
Tracked (47 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
More by 兰桂 吴
View all →
Full revenue analysis
Read the article-style breakdown for ChmPlus Pro: CHM/EPUB Reader: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.