English Dictionary - LDOCE PRO
64
Quality Score
Solid
✍️ Bumetric analysis
“
English Dictionary - LDOCE PRO is an iOS app from Nguyen Thi Hoai Thu, currently rated 4.7★ across 2,209 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 64: Solid (established niche player). For an app like this, 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
$10.2K
per month
→
12-mo forecast
$10.6K – $22.1K
per month
→
24-mo forecast
$13.1K – $39.3K
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
43 snapshots on record
Rating
4.7
Reviews
2,209 reviews
Forecast Revenue / mo
$10.2K
Snapshots tracked
43
since Oct 2018
ONE-TIME · BUILD
💰 Estimated build cost
$140K
↳ What it cost to build · not monthly revenue
Likely range $105K – $190K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~1.2y 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 (731 MB) | +$40K |
| ⚙ 8.0y maintenance × ~1-person team | +$48K |
Total estimate
$140K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$200K
↳ What it would sell for · not monthly revenue
Marketplace range $150K – $275K · 21× MRR multiple
💸
~1.4× build cost (break-even+)
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 |
| 📅 8.0y proven track record | +20% |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
Final multiple
21× MRR
👥 Estimated audience size
230K
Lifetime downloads (US-equivalent)
Monthly active
22K
Daily active
4.4K
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
| 📲 category engagement | ~150 installs / rating |
| 📅 8.0y of rating accumulation | -30% |
| 🔁 category D30 retention | 15% |
| 📍 DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
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 | 731 MB |
| 🏷 Category context | category |
| 📦 Large iOS bundle | → Native Swift / UIKit (pre-2020 era) + assets |
💀 Maintenance status
At risk
50%
Last shipped 2025-10-03 · 356 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
| 📅 11 months since last update | Concerning gap |
Verdict
At risk
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$10.2K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$9.7K – $16.1K
12 months
$10.6K – $22.1K
24 months
$13.1K – $39.3K
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 · 50/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
4.7
Product Quality
8.5
Revenue Strength
4.0
Monetization Maturity
1.0
Defensibility
5.5
Market Position
2.0
Operational Safety
9.0
- 💰 Revenue: Modest — $7K - $15K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.74★ across 2,209 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 351d ago — slow cadence.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 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 = $183K-$326K.
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 9 of 9 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($14.99)METRIC | +$2,800 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Low install base (2,209 ratings)METRIC | +$1,500 | |
| Mature app (8y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| 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.
🆕 What's New · v1.51
Thanks for using the app! We update the app regularly so we can make it better for you. Get the latest version for all of the available English Dictionary - LDOCE PRO with new features. This version includes several bug fixes and performance improvements.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- English Dictionary - LDOCE PRO
- Developer
- Nguyen Thi Hoai Thu
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Not found
- 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
- Available
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- Model estimate / mo
- $10.2K/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 growth2,208 ratings+220700% lifetimeShow 3-year history estimate ▾
Tracked (43 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
Download the essential and most comprehensive dictionary app for dependable definitions at your fingertips.
● English Dictionary - LDOCE is the leading free English dictionary app for iPhone – with over 2,000,000 trusted definitions and synonyms, the app is designed and optimized for your mobile device.
- 165,000 corpus-based examples of natural English show words in context and how English is really used.
- 230,000 words, phrases, and meanings – more than any other learner's dictionary.
● More dictionary you can use:
- English Dictionary:… View full description on the official store →
● English Dictionary - LDOCE is the leading free English dictionary app for iPhone – with over 2,000,000 trusted definitions and synonyms, the app is designed and optimized for your mobile device.
- 165,000 corpus-based examples of natural English show words in context and how English is really used.
- 230,000 words, phrases, and meanings – more than any other learner's dictionary.
● More dictionary you can use:
- English Dictionary:… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 731 MB🔞 4+📱 iOS 13.0+🔖 v1.51🔄 updated 11mo ago🌐 EN💰 Paid🚀 Launched 2018 (8y old)
📅
What Worked™ · Development Pipeline
9 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 →
2026-03
📈
Crossed 100 ratings — social-proof flywheel kicking in
2026-03
⭐
Rating ↑ 4.13 → 4.74 (improved 0.61★)
2026-03
💲
Went paid — introduced $14.99 price point
2021-01
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.06★ high confidence
2021-01
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.06★ · reviews +9 high confidence
2019-09
⭐
Rating ↓ 4.71 → 4.12 (dropped 0.59★)
2019-08
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.59★ high confidence
2019-08
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.77★ · reviews +8 high confidence
2018-10
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 8 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.60714★ | 28 | 4.60714★ this version |
| 🇧🇷 BR | 4.44444★ | 9 | 4.44444★ this version |
| 🇨🇦 CA | 4.64463★ | 121 | 4.64463★ this version |
| 🇩🇪 DE | 4.66667★ | 21 | 4.66667★ this version |
| 🇫🇷 FR | 4.9★ | 10 | 4.9★ this version |
| 🇮🇳 IN | 4.80952★ | 21 | 4.80952★ this version |
| 🇯🇵 JP | 4.36842★ | 19 | 4.36842★ this version |
| 🇺🇸 US | 4.74139★ | 2,208 | 4.74139★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for English Dictionary - LDOCE PRO: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Nguyen Thi Hoai Thu
View all →📦 Portfolio summaryMID studio
4apps·$720K/mocombined
⚠ Concentrated — top app contributes 97% of combined revenue (single-app dependency)
About this analysis
Why medium confidence: 2,209 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does English Dictionary - LDOCE PRO make per month?▴
Based on our ML-calibrated revenue forecast, English Dictionary - LDOCE PRO earns approximately $10K/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 English Dictionary - LDOCE PRO profitable?▴
With estimated build cost $140K and monthly revenue $10K, English Dictionary - LDOCE PRO looks break-even-grade — payback period sits around 1.2 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does English Dictionary - LDOCE PRO have?▴
Estimated audience: ~230K lifetime downloads, ~22K monthly active users, and ~4K 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 is English Dictionary - LDOCE PRO built with?▴
Our heuristic places English Dictionary - LDOCE PRO on the Native iOS (Swift / UIKit) 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 English Dictionary - LDOCE PRO still actively maintained?▴
Maintenance status: At risk (50% abandonment risk). Last shipped version was 11 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would English Dictionary - LDOCE PRO sell for?▴
Estimated acquisition value: $200K (marketplace range $150K – $275K). Calculated as 21× 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 English Dictionary - LDOCE PRO last updated?▴
English Dictionary - LDOCE PRO last shipped a new version on 2025-10-03 — 11 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes English Dictionary - LDOCE PRO?▴
English Dictionary - LDOCE PRO is published by Nguyen Thi Hoai Thu 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 English Dictionary - LDOCE PRO's BU Score?▴
English Dictionary - LDOCE PRO has a BU Score of 64/100 (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.