두루책방
51
Quality Score
Solid
두루책방
by Enuma, Inc.
Low confidence
✍️ Bumetric analysis
“
두루책방 is an iOS app from Enuma, Inc. in the Food & Drink category, currently rated 4.3★ across 30 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 51: Solid (established niche player). For a Food & Drink 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
$500
per month
→
12-mo forecast
$437 – $1575
per month
→
24-mo forecast
$405 – $3644
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
12 snapshots on record
Rating
4.3
Reviews
30 reviews
Forecast Revenue / mo
$500
Snapshots tracked
12
since Dec 2021
ONE-TIME · BUILD
💰 Estimated build cost
$135K
↳ What it cost to build · not monthly revenue
Likely range $100K – $180K
$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 (655 MB) | +$40K |
| ⚙ Food & Drink complexity ×1.10 | +$9K |
| ⚙ 5.9y maintenance × ~1-person team | +$35K |
Total estimate
$135K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$10K
↳ What it would sell for · not monthly revenue
Marketplace range $5K – $10K · 17× 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 |
| 📅 5.9y proven track record | +20% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
17× MRR
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
Medium confidence · 55%
Also possible
React Native
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 | 655 MB |
| 🏷 Category context | Food & Drink |
| 📦 Large iOS bundle | → Native SwiftUI (post-2020 era) + assets |
💀 Maintenance status
Likely abandoned
95%
Last shipped 2020-10-30 · 2163 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
| 📅 5y+ since last update | Likely abandoned |
| 👥 Small user base (30 ratings) + 5.9y old | +10% (solo-project pattern) |
Verdict
Likely abandoned
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$426 – $993
12 months
$437 – $1.6K
24 months
$405 – $3.6K
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 · 34/100INDIE TIERlimited signalGrowth Velocity
5.0
Founder Strength
2.9
Product Quality
3.5
Revenue Strength
2.7
Monetization Maturity
1.0
Defensibility
3.5
Market Position
2.0
Operational Safety
7.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.33★ across 30 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 2162d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (2162d 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 = $9K-$16K.
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 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Good rating (4.3★)METRIC | +$800 | |
| Established app (5y old)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (30 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.
🆕 What's New · v1.2
English app name added in app stores other than Korea.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- 두루책방
- Developer
- Enuma, Inc.
- Bundle ID
- com.enuma.easylibrary
- App Store URL
- Open in App Store
- Category
- Food & Drink
- Content rating
- 4+
- Languages
- KO
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
- $500/mo
- Top-grossing rank
- Outside top 100 in US Food & Drink
- 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 growth30 ratings+2900% lifetimeShow 3-year history estimate ▾
Tracked (12 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.
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 "Dooru Library" was created through a partnership between The Foundation SeeArt and educational tech start-up Enuma.
› The library is comprised of 124 Korean books and 84 books in other languages, making a total of 204 books categorized into 6 levels.
› You can choose between various levels starting from level 1, which contains short words and sentences, up to level 6, which is perfect for 1st and 2nd graders.
› The books cover various topics, such as animals, science, food, life, nature, history, and adventure. You're free to choose whatever interests you the most.… View full description on the official store →
› The library is comprised of 124 Korean books and 84 books in other languages, making a total of 204 books categorized into 6 levels.
› You can choose between various levels starting from level 1, which contains short words and sentences, up to level 6, which is perfect for 1st and 2nd graders.
› The books cover various topics, such as animals, science, food, life, nature, history, and adventure. You're free to choose whatever interests you the most.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 655 MB🔞 4+📱 iOS 13.0+🔖 v1.2🔄 updated 5y ago🌐 KO📂 Food & Drink💰 Paid🚀 Launched 2020 (5y old)
📅
What Worked™ · Development Pipeline
7 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 10 ratings — social-proof flywheel kicking in
2026-05
⭐
Rating ↑ 4.00 → 4.33 (improved 0.33★)
2026-05
🔄
Monetization changed: freemium → free
2025-10
⭐
Rating ↓ 4.00 → 3.60 (dropped 0.40★)
→ 30 days after: revenue +$92/mo · rating +0.23★ high confidence
2022-05
⭐
Rating ↑ 3.50 → 4.00 (improved 0.50★)
2022-02
⭐
Rating ↓ 4.00 → 3.50 (dropped 0.50★)
2021-12
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4★ | 5 | 4★ this version |
| 🇧🇷 BR | 5★ | 4 | 5★ this version |
| 🇨🇦 CA | 4★ | 6 | 4★ this version |
| 🇩🇪 DE | 4.75★ | 4 | 4.75★ this version |
| 🇫🇷 FR | 4.71429★ | 7 | 4.71429★ this version |
| 🇬🇧 GB | 4.59999★ | 5 | 4.59999★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
| 🇯🇵 JP | 4.33333★ | 6 | 4.33333★ this version |
| 🇺🇸 US | 4.33333★ | 30 | 4.33333★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
About this analysis
Why low confidence: only 30 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does 두루책방 make per month?▴
Based on our ML-calibrated revenue forecast, 두루책방 earns approximately $500/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 두루책방 profitable?▴
With estimated build cost $135K and monthly revenue $500, 두루책방 looks well below break-even — current monthly revenue is much smaller than the estimated build cost. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
What apps are like 두루책방?▴
Browse the full Food & Drink 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 두루책방 built with?▴
Our heuristic places 두루책방 on the Native iOS (SwiftUI) stack (Medium confidence, 55%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.
Is 두루책방 still actively maintained?▴
Maintenance status: Likely abandoned (95% abandonment risk). Last shipped version was 5+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would 두루책방 sell for?▴
Estimated acquisition value: $10K (marketplace range $5.0K – $10K). Calculated as 17× 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 두루책방 last updated?▴
두루책방 last shipped a new version on 2020-10-30 — more than 5 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes 두루책방?▴
두루책방 is published by Enuma, Inc. 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 두루책방's BU Score?▴
두루책방 has a BU Score of 51/100 (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.