LinDuo: Learn English
79
Quality Score
Strong
LinDuo: Learn English
by Vitali Simsive
High confidence
✍️ Bumetric analysis
“
LinDuo: Learn English is an iOS app from Vitali Simsive in the News category, currently rated 4.9★ across 114,943 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 79: Strong (healthy traction). For a News app, that means healthy traction. 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
$700K
per month
→
12-mo forecast
$741K – $1141K
per month
→
24-mo forecast
$886K – $1645K
per month
BIG 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
22 snapshots on record
Rating
4.9
Reviews
114,943 reviews
Forecast Revenue / mo
$700K
Snapshots tracked
22
since Dec 2020
ONE-TIME · BUILD
💰 Estimated build cost
$155K
↳ What it cost to build · not monthly revenue
Likely range $115K – $210K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in under a month 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 |
| 💎 In-app purchase plumbing | +$9K |
| 📦 Asset bundle (280 MB) | +$40K |
| ⚙ News complexity ×1.20 | +$19K |
| ⚙ 6.0y maintenance × ~1-person team | +$35K |
Total estimate
$155K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$27.0M
↳ What it would sell for · not monthly revenue
Marketplace range $20.0M – $35.0M · 38× MRR multiple
💸
~174× return on build cost
Synthetic estimate. Multiple band derived from iap / freemium model + 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
| 💎 IAP / freemium model base | 28× MRR |
| 📅 6.0y proven track record | +20% |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 News category multiple | -5% |
| ⭐ Mature user base (100K+ ratings) | +5% |
Final multiple
38× MRR
👥 Estimated audience size
9.7M
Lifetime downloads (US-equivalent)
Monthly active
1.1M
Daily active
495K
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 |
| 📅 6.0y of rating accumulation | -30% |
| 🔁 News D30 retention | 15% |
| 📍 DAU / MAU stickiness | 0.45 |
DAU / MAU
45% sticky
🛠 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 | 280 MB |
| 🏷 Category context | News |
| 📦 Large iOS bundle | → Native SwiftUI (post-2020 era) + assets |
💀 Maintenance status
Likely abandoned
88%
Last shipped 2023-12-19 · 1057 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
| 📅 2y+ since last update | Likely abandoned |
Verdict
Likely abandoned
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$700K/mo · ML-estimated from 234 triggers
Growth rate
+2.5% MoM · BIG tier baseline (compound monthly)
6 months
$690K – $933K
12 months
$741K – $1.1M
24 months
$886K – $1.6M
Compound growth at +2.5% MoM (tier baseline for BIG). Range widens with horizon — typical noise band ±15% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Mixed signals · 57/100BIG TIERcompetitive but cautiousGrowth Velocity
5.0
Founder Strength
4.9
Product Quality
9.7
Revenue Strength
5.8
Monetization Maturity
5.0
Defensibility
6.0
Market Position
2.0
Operational Safety
7.0
- 💰 Revenue: Healthy — $280K - $1540K/mo · BIG tier · medium-low confidence, trajectory unclear.
- ⭐ Quality: 4.86★ across 114,943 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 1056d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (1056d 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 = $12.6M-$22.4M.
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 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| High install base (114,943 ratings)METRIC | +$12,000 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| Multilingual (28 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Established app (5y old)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.
🆕 What's New · v5.32.1
Every 5-star review speeds up the release of an app update!
Added GDPR Consent Message for users in the EU and UK
Added seven new achievements, increased rewards
Separate button for slow pronunciation
Pause during answer affects the next question… Full release notes →
Added GDPR Consent Message for users in the EU and UK
Added seven new achievements, increased rewards
Separate button for slow pronunciation
Pause during answer affects the next question… Full release notes →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- LinDuo: Learn English
- Developer
- Vitali Simsive
- Bundle ID
- com.lin.duo.hd.english
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 4+
- Languages
- AR, BE, CS, NL, EN, FR, DE, EL, HI, HU, ID, IT, JA, KK, KO, FA, PL, PT, RO, RU, ZH, ES, TL, TH, TR, UK, UZ, VI
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
- $700K/mo
- Top-grossing rank
- Outside top 100 in US News
- All-time revenue
- Not found
- Pricing
- $1.99 - $29.90 per item
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 growth102 ratings+10100% lifetimeShow 3-year history estimate ▾
Tracked (22 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.
🚀Update Frequency · Releases per Quarter3 releases tracked
🚀Version Release Timeline3 releases tracked
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
ADVANTAGES OF OUR APP:
* Castilian pronunciation by a native speaker
* 2375 words split into 180 topic lessons
* Does not require permanent Internet connection
* Beautiful illustrations for each word
* Phonetic transcription for each word
* Dark interface to study at night
* Choose from male and female voice
* Built in app dictionary with progress
* Game "True or False" to review pas material
* Special lessons with favorite, difficult, old, random words
* Flexible sound settings (music, speaker, effects)
* Just 10-15 minutes per day to learn all words
* For adults and teens 13+… View full description on the official store →
* Castilian pronunciation by a native speaker
* 2375 words split into 180 topic lessons
* Does not require permanent Internet connection
* Beautiful illustrations for each word
* Phonetic transcription for each word
* Dark interface to study at night
* Choose from male and female voice
* Built in app dictionary with progress
* Game "True or False" to review pas material
* Special lessons with favorite, difficult, old, random words
* Flexible sound settings (music, speaker, effects)
* Just 10-15 minutes per day to learn all words
* For adults and teens 13+… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 280 MB🔞 4+📱 iOS 11.0+🔖 v5.32.1🔄 updated 2y ago🌐 AR, BE, CS, NL, EN +23📂 News💰 Paid📺 Ad-supported💎 IAP $1.99 - $29.90 per item🚀 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 →
2026-06
📸
Refreshed store screenshots — 8 of 8 updated
→ 30 days after: revenue +$8.1K/mo · rating −0.09★ · reviews −114,841 high confidence
2026-06
📈
Crossed 500 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$8.1K/mo · rating −0.09★ · reviews −114,841 high confidence
2026-05
🔄
Monetization changed: freemium → free
→ 30 days after: revenue −$86/mo · rating +0.09★ · reviews +114,841 medium · co-occurring
2026-05
🔧
Shipped update — v5.32.1 → v5.36.1
→ 30 days after: revenue −$86/mo · reviews +114,219 low · multiple changes
2026-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
2024-12
📈
Crossed 10 ratings — social-proof flywheel kicking in
2020-12
🚀
First tracked snapshot — initial data captured
📸
Store Page History
8 SCREENSHOT CHANGESEvery time a developer swaps a store screenshot we archive both versions. Compare side-by-side to see what messaging / visuals changed.
iPhone screenshots
Slot 1
2 ver.
2 ver.
2026-05-13
2026-06-23
Slot 2
2 ver.
2 ver.
2026-05-13
2026-06-23
Slot 3
2 ver.
2 ver.
2026-05-13
2026-06-23
Slot 4
2 ver.
2 ver.
2026-05-13
2026-06-23
Slot 5
2 ver.
2 ver.
2026-05-13
2026-06-23
Slot 6
2 ver.
2 ver.
2026-05-13
2026-06-23
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.85714★ | 7 | 4.85714★ this version |
| 🇧🇷 BR | 4.5★ | 4 | 4.5★ this version |
| 🇨🇦 CA | 4.63636★ | 11 | 4.63636★ this version |
| 🇩🇪 DE | 4.95652★ | 23 | 4.95652★ this version |
| 🇫🇷 FR | 4.72222★ | 36 | 4.72222★ this version |
| 🇬🇧 GB | 5★ | 8 | 5★ this version |
| 🇮🇳 IN | 5★ | 1 | 5★ this version |
| 🇯🇵 JP | 5★ | 4 | 5★ this version |
| 🇺🇸 US | 4.77451★ | 102 | 4.77451★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for LinDuo: Learn English: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why high confidence: 114,943 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does LinDuo make per month?▴
Based on our ML-calibrated revenue forecast, LinDuo earns approximately $700K/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 LinDuo profitable?▴
With estimated build cost $155K and monthly revenue $700K, LinDuo looks highly profitable — pays back its build investment in under a month at the current run-rate. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does LinDuo have?▴
Estimated audience: ~9.7M lifetime downloads, ~1.1M monthly active users, and ~495K 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 LinDuo?▴
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 LinDuo built with?▴
Our heuristic places LinDuo 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 LinDuo still actively maintained?▴
Maintenance status: Likely abandoned (88% abandonment risk). Last shipped version was 2+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would LinDuo sell for?▴
Estimated acquisition value: $27.0M (marketplace range $20.0M – $35.0M). Calculated as 38× 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 LinDuo last updated?▴
LinDuo last shipped a new version on 2023-12-19 — more than 2 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes LinDuo?▴
LinDuo is published by Vitali Simsive 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 LinDuo's BU Score?▴
LinDuo has a BU Score of 79/100 (Strong). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.