4BOOK - GDZ, textbooks Ukraine
60
Quality Score
Solid
4BOOK - GDZ, textbooks Ukraine
Medium confidence
✍️ bumetric analysis
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4BOOK - GDZ, textbooks Ukraine is an Android app from 4BOOK.ORG (Makarov Iliya) in the Education category, currently rated 4.2★ across 3,881 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 60: Solid (established niche player). For a Education 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
$708
per month
→
12-mo forecast
$619 – $2232
per month
→
24-mo forecast
$574 – $5163
per month
INDIE 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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$95K
↳ What it cost to build · not monthly revenue
Likely range $70K – $130K
$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 |
| ⚙ Education complexity ×1.20 | +$10K |
| 🌐 Cross-platform reach (iOS + Android) | +$33K |
Total estimate
$95K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$10K
↳ What it would sell for · not monthly revenue
Marketplace range $10K – $15K · 16× MRR multiple
💸
~0.1× 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 |
| 🏷 Education category multiple | +6% |
Final multiple
16× MRR
👥 Estimated audience size
325K
Lifetime downloads (US-equivalent)
Monthly active
58K
Daily active
17K
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
| 📲 Education engagement | ~85 installs / rating |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$708/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
6 months
$603 – $1.4K
12 months
$619 – $2.2K
24 months
$574 – $5.2K
Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Pre-traction · 39/100INDIE TIERlimited signalGrowth Velocity
5.0
Founder Strength
3.9
Product Quality
7.7
Revenue Strength
2.9
Monetization Maturity
1.0
Defensibility
4.2
Market Position
0.0
Operational Safety
7.0
- 💰 Revenue: Marginal — $283 - $1770/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.25★ across 3,881 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 1291d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (1291d 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 = $12K-$22K.
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:
| Low install base (3,881 ratings)METRIC | +$1,500 | |
| Mature app (8y old)METRIC | +$1,500 | |
| Good rating (4.2★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 |
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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- 4BOOK - GDZ, textbooks Ukraine
- Developer
- 4BOOK.ORG (Makarov Iliya)
- Bundle ID
- net.pixeltk.a4book
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- 4book.org
- 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
- $708/mo
- Top-grossing rank
- Not found
- 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 growth3,881 ratings+65% lifetimeShow 3-year history estimate ▾
Tracked (1 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
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 most complete and qualitative Answer keys (GDZ) and Textbooks are represented on the educational site for schoolchildren of 1 - 11 classes of Ukraine - 4BOOK.ORG.
We tried to prepare answers and complete solutions to homework assignments to most textbooks, workbooks, laboratory and practical work, control and independent work on all subjects of the new school curriculum.… View full description on the official store →
We tried to prepare answers and complete solutions to homework assignments to most textbooks, workbooks, laboratory and practical work, control and independent work on all subjects of the new school curriculum.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v1.40🔄 updated 0d ago📂 Education💰 Free📺 Ad-supported
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for 4BOOK - GDZ, textbooks Ukraine: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why medium confidence: 3,881 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does 4BOOK - GDZ, textbooks Ukraine make per month?▴
Based on our ML-calibrated revenue forecast, 4BOOK - GDZ, textbooks Ukraine earns approximately $708/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 4BOOK - GDZ, textbooks Ukraine?▴
Browse the full Education 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 4BOOK - GDZ, textbooks Ukraine?▴
4BOOK - GDZ, textbooks Ukraine is published by 4BOOK.ORG (Makarov Iliya) on the Google Play 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 4BOOK - GDZ, textbooks Ukraine's BU Score?▴
4BOOK - GDZ, textbooks Ukraine has a BU Score of 60/100 (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.