BiLibre DjVu and PDF Reader
54
Quality Score
Solid
BiLibre DjVu and PDF Reader
Medium confidence
✍️ bumetric analysis
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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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$65K
↳ What it cost to build · not monthly revenue
Likely range $50K – $90K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Slow ROI — current MRR is well below build cost
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 |
Total estimate
$65K
👥 Estimated audience size
12K
Lifetime downloads (US-equivalent)
Monthly active
1.8K
Daily active
810
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 |
| 🔁 News D30 retention | 15% |
| 📍 DAU / MAU stickiness | 0.45 |
DAU / MAU
45% sticky
🔬
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 · 45/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
5.7
Product Quality
6.1
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
5.7
Market Position
2.0
Operational Safety
7.0
- 💰 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 3258d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3258d 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 ($10K/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 (8y 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
This update from Apple will improve the functionality of this app. No new features are included.
Fixed an error occurring when using the translation service.
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
- kolyvan.com
- Description
- Kolyvan Site
- 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
- $86/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 (17 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.
💰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 0d ago🌐 EN, RU📂 News💰 Paid
📅
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
⭐
Rating ↓ 4.70 → 4.35 (dropped 0.35★)
2026-05
📈
Crossed 50 ratings — social-proof flywheel kicking in
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★)
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
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.5★ | 8 | 4.5★ this version |
| 🇧🇷 BR | 5★ | 9 | 5★ this version |
| 🇨🇦 CA | 5★ | 6 | 5★ this version |
| 🇩🇪 DE | 3.83333★ | 18 | 3.83333★ this version |
| 🇫🇷 FR | 4.33333★ | 6 | 4.33333★ this version |
| 🇬🇧 GB | 5★ | 8 | 5★ this version |
| 🇮🇳 IN | 4.82353★ | 17 | 4.82353★ this version |
| 🇯🇵 JP | 4.5★ | 10 | 4.5★ this version |
| 🇺🇸 US | 4.34951★ | 103 | 4.34951★ this version |
🔔
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📝 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·$10K/mocombined
⚠ Concentrated — top app contributes 86% of combined revenue (single-app dependency)
About this analysis
Why medium confidence: 103 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 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 $86/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.
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.
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.