BiLibre DjVu and PDF Reader
54
Quality Score
Solid
✍️ Bumetric analysis
“
BiLibre DjVu and PDF Reader is an iOS app from Konstantin Bukreev in the News category, currently rated 4.3★ across 103 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Quality Score is 54: Solid (established niche player). For a News app, that means established niche player. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
per month
MID tier
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
21 snapshots on record
Rating
4.3
Reviews
103 reviews
Forecast Revenue / mo
$5.0K
Snapshots tracked
21
since Jun 2017
ONE-TIME · BUILD
💰 Estimated build cost
$120K
↳ What it cost to build · not monthly revenue
Likely range $90K – $160K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2.0y at current MRR
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱 MVP baseline (design + 1-store ship) | +$28K |
| 📱 5 unique screens × $4.5K | +$22K |
| 📦 Asset bundle (57 MB) | +$2K |
| ⚙ News complexity ×1.20 | +$10K |
| ⚙ 9.3y maintenance × ~1-person team | +$55K |
Total estimate
$120K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$75K
↳ What it would sell for · not monthly revenue
Marketplace range $50K – $100K · 16× MRR multiple
💸
~0.6× build cost (under-water)
Synthetic estimate. Multiple band derived from ad-supported + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 📺 Ad-supported base | 15× MRR |
| 📅 9.3y proven track record | +20% |
| 🏷 News category multiple | -5% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
16× MRR
👥 Estimated audience size
8.6K
Lifetime downloads (US-equivalent)
Monthly active
720
Daily active
320
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲 News engagement | ~120 installs / rating |
| 📅 9.3y of rating accumulation | -30% |
| 🔁 News D30 retention | 15% |
| 📍 DAU / MAU stickiness | 0.45 |
DAU / MAU
44% sticky
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
Medium confidence · 70%
Also possible
Flutter
Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries — for binary-level certainty you would need an SDK intelligence tool or the manifest itself. Reasoning chain on the right. Full ruleset on /methodology.
Signals we read
| 📦 App bundle size | 57 MB |
| 🏷 Category context | News |
| 📦 Small-mid iOS bundle | → Native Swift / UIKit (pre-2020 era) |
💀 Maintenance status
Likely abandoned
95%
Last shipped 2017-07-04 · 3375 days ago
0 · Active
50 · At risk
100 · Abandoned
Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.
Risk signals
| 📅 9y+ since last update | Likely abandoned |
| 👥 Small user base (103 ratings) + 9.3y old | +10% (solo-project pattern) |
Verdict
Likely abandoned
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 46/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
6.1
Market Position
2.0
Growth Velocity
5.0
Defensibility
5.8
Operational Safety
7.0
Founder Strength
6.1
Monetization Maturity
1.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.35★ across 103 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 3375d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3375d since update).
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K. Portfolio play ($24K/mo combined) commands premium.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
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 (9y old)METRIC | +$1,500 | |
| Good rating (4.3★)METRIC | +$800 | |
| Early-stage install base (103 ratings)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.
🆕 What's New · v0.6.1
Fixed an error occurring when using the translation service.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- BiLibre DjVu and PDF Reader
- Developer
- Konstantin Bukreev
- Bundle ID
- com.kolyvan.tabula
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 17+
- Languages
- EN, RU
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
- Available
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- Model estimate / mo
- $5.0K/mo
- Top-grossing rank
- Outside top 100 in US News
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth103 ratings+10200% lifetimeShow 3-year history estimate ▾
Tracked (21 weeks) Pre-tracking estimate (0 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.
💰Pricing History$0.00 → $1.99 (+0%)
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.
📝 About this app
The application for reading and cataloging books, textbooks, reference books and documents in DjVu and PDF formats in a modern, user-friendly style. Designed mainly for working with technical, scientific and educational literature.
COMFORTABLE READING MODE
• Crops a page margins in manual and automatic mode.
• Themes, color schemes for reading (day, night, sepia and more).
• Page turn with scroll, curl and slide.
POWERFUL ANNOTATIONS
• Notes, stickers and scraps.
• Drawn annotations (Apple Pencil support and just by touching).
• Exports annotations in HTML, PDF, RTF formats.… View full description on the official store →
COMFORTABLE READING MODE
• Crops a page margins in manual and automatic mode.
• Themes, color schemes for reading (day, night, sepia and more).
• Page turn with scroll, curl and slide.
POWERFUL ANNOTATIONS
• Notes, stickers and scraps.
• Drawn annotations (Apple Pencil support and just by touching).
• Exports annotations in HTML, PDF, RTF formats.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 57 MB🔞 17+📱 iOS 10.0+🔖 v0.6.1🔄 updated 9y ago🌐 EN, RU📂 News💰 Paid🚀 Launched 2017 (9y old)
📅
What Worked™ · Development Pipeline
11 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
📈
Crossed 50 ratings — social-proof flywheel kicking in
2026-05
⭐
Rating ↓ 4.70 → 4.35 (dropped 0.35★)
2026-05
💲
Went paid — introduced $1.99 price point
2026-03
⭐
Rating ↑ 2.40 → 4.70 (improved 2.30★)
2024-01
📈
Crossed 10 ratings — social-proof flywheel kicking in
2020-10
⭐
Rating ↓ 3.50 → 3.14 (dropped 0.36★)
2019-11
⭐
Rating ↓ 3.75 → 3.20 (dropped 0.55★)
2019-10
⭐
Rating ↑ 3.33 → 3.75 (improved 0.42★)
→ 30 days after: rating −0.55★ high confidence
2018-03
⭐
Rating ↓ 4.50 → 3.33 (dropped 1.17★)
2017-08
⭐
Rating ↓ 5.00 → 4.50 (dropped 0.50★)
2017-06
🚀
First tracked snapshot — initial data captured
→ 30 days after: rating −0.50★ medium · co-occurring
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 4.34951★ | 103 | 4.34951★ this version |
| 🇬🇧 GB | 5★ | 8 | 5★ this version |
| 🇩🇪 DE | 3.83333★ | 18 | 3.83333★ this version |
| 🇫🇷 FR | 4.33333★ | 6 | 4.33333★ this version |
| 🇯🇵 JP | 4.4★ | 10 | 4.4★ this version |
| 🇨🇦 CA | 5★ | 7 | 5★ this version |
| 🇦🇺 AU | 4.5★ | 8 | 4.5★ this version |
| 🇧🇷 BR | 5★ | 9 | 5★ this version |
| 🇮🇳 IN | 4.82353★ | 17 | 4.82353★ this version |
🔔
Track this app’s revenue
FREEGet an email when revenue moves by your threshold. No spam, unsubscribe in one click.
📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for BiLibre DjVu and PDF Reader: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Konstantin Bukreev
View all →📦 Portfolio summaryINDIE studio
3apps·$15K/mocombined
✓ Diversified — top app contributes 33%; risk spread across portfolio
About this analysis
Why medium confidence: 103 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does BiLibre DjVu and PDF Reader make per month?▴
Based on our ML-calibrated revenue forecast, BiLibre DjVu and PDF Reader earns approximately $5.0K/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
Is BiLibre DjVu and PDF Reader profitable?▴
With estimated build cost $120K and monthly revenue $5.0K, BiLibre DjVu and PDF Reader looks break-even-grade — payback period sits around 2.0 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does BiLibre DjVu and PDF Reader have?▴
Estimated audience: ~8K lifetime downloads, ~720 monthly active users, and ~320 daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.
What apps are like BiLibre DjVu and PDF Reader?▴
Browse the full News category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
What is BiLibre DjVu and PDF Reader built with?▴
Our heuristic places BiLibre DjVu and PDF Reader on the Native iOS (Swift / UIKit) stack (Medium confidence, 70%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is BiLibre DjVu and PDF Reader still actively maintained?▴
Maintenance status: Likely abandoned (95% abandonment risk). Last shipped version was 9+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would BiLibre DjVu and PDF Reader sell for?▴
Estimated acquisition value: $75K (marketplace range $50K – $100K). Calculated as 16× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.
When was BiLibre DjVu and PDF Reader last updated?▴
BiLibre DjVu and PDF Reader last shipped a new version on 2017-07-04 — more than 9 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes BiLibre DjVu and PDF Reader?▴
BiLibre DjVu and PDF Reader is published by Konstantin Bukreev on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is BiLibre DjVu and PDF Reader's BU Score?▴
BiLibre DjVu and PDF Reader has a BU Score of 54/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.