0
BU Score
Niche
DjVu Reader Pro
✍️ bumetric analysis
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DjVu Reader Pro is an iOS app from 群群 刘 in the Productivity category, currently rated — across few ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 0: Niche (micro-niche or pre-traction stage). For a Productivity app, that means micro-niche or pre-traction stage.
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 4 of 4 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 | |
| Mature app (11y old)METRIC | +$1,500 | |
| slowREVIEW | −$1,200 | |
| Single-language (English only)METRIC | −$400 |
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 →💾 3 MB🔞 4+📱 iOS 11.1+🔖 v1.9.4🔄 updated 5y ago🌐 EN📂 Productivity💰 Free🚀 Launched 2015 (11y old)
📝 About this app
DjVu Reader Pro is a intuitive and powerful application to read DjVu(*.djvu, *djv) documents on the iOS.
DjVu Reader FS is also available on Mac OS.
KEY FEATURES:
◆Pinch to zoom in or out, Smart zoom is also available.
◆Bookmarks Management.
◆Table of contents supported.
◆Text Selectable, copy text to clipboard for further or define text.
◆Text searchable, highlight the word you need.
◆Brightness adjustable.
◆Record documents recently read.
◆Show or hide links.
◆History of pages, back or forward the page.
◆Share or open document with other App.
◆Print document.
◆Add files with desktop web browser.
SUPPORT:
You can refer User Manual for any assistance or contact support.
Please feel free to contact us if you have any questions about using our products at any time.
Email: support@firmshell.com
DjVu Reader FS is also available on Mac OS.
KEY FEATURES:
◆Pinch to zoom in or out, Smart zoom is also available.
◆Bookmarks Management.
◆Table of contents supported.
◆Text Selectable, copy text to clipboard for further or define text.
◆Text searchable, highlight the word you need.
◆Brightness adjustable.
◆Record documents recently read.
◆Show or hide links.
◆History of pages, back or forward the page.
◆Share or open document with other App.
◆Print document.
◆Add files with desktop web browser.
SUPPORT:
You can refer User Manual for any assistance or contact support.
Please feel free to contact us if you have any questions about using our products at any time.
Email: support@firmshell.com
🆕 What's New · v1.9.4
Bug fixes and stability improvements
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- DjVu Reader Pro
- Developer
- 群群 刘
- Bundle ID
- com.firmshell.djvureaderproios
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- EN
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $223/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- 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
- https://apps.apple.com/us/iphone/story/id1500620631
⭐Recent App Store Reviews5 latest · avg 4.6★ · 60.0% 5★ · 0% 1★
5★3 (60%)
4★2 (40%)
3★0 (0%)
2★0 (0%)
1★0 (0%)
+0 ratings/week
Praise: best ×2 excellent ×1 great ×1
Top positive
★★★★★ Excellent DjVu interface/functionality.
I am a former librarian and an expert on books. This app is an excellent way to view large Divu-format ebooks on your iPhone or iPod touch. in particular on older devices with slower processors. Divu files generally load a lot more quickly …
★★★★★ Best of the best!
Nice app... Will be better if I can add Folders to separate files...…
Top negative
★★★★☆ Great! Thanks!
Best program for reading DJVU files!…
★★★★☆ Most of features worked
It works with some djvu files (some of which turn into literally multi gigabyte files when converted to pdf) for which pdf conversion is not an option.…
🌍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.
Full revenue analysis
Read the article-style breakdown for DjVu Reader Pro: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.