53
Quality Score
Solid
Linguin - Listening Practice
Medium confidence
✍️ bumetric analysis
“
Linguin - Listening Practice is an iOS app from Bernard Jollans in the News category, currently rated 4.2★ across 157 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 53: 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
$500
per month
→
12-mo forecast
$437 – $1575
per month
→
24-mo forecast
$405 – $3644
per month
INDIE tierSUBSCRIPTION
💡 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
$80K
↳ What it cost to build · not monthly revenue
Likely range $60K – $110K
$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 (67 MB) | +$6K |
| ⚙News complexity ×1.20 | +$11K |
| ⚙2.0y maintenance × ~1-person team | +$11K |
Total estimate$80K
👥 Estimated audience size
16K
Lifetime downloads (US-equivalent)
Monthly active
2.4K
Daily active
1.0K
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 |
| 📅2.0y of rating accumulation | -10% |
| 🔁News D30 retention | 15% |
| 📍DAU / MAU stickiness | 0.45 |
DAU / MAU42% sticky
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
Medium confidence · 70%
Also possible
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 | 67 MB |
| 🏷Category context | News |
| 📦Small-mid iOS bundle | → Native SwiftUI (post-2020 era) |
💀 Maintenance status
Active
15%
Last shipped 2026-04-19 · 35 days ago
0 · Active50 · At risk100 · 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
| 📅35 days since last update | Healthy release cadence |
VerdictActive
🔬
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
Tailwinds: monetization model proven
Headwinds: review-mined risks present
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
Early-stage solo · 40/100INDIE TIERSUBSCRIPTIONexpected for tierRevenue Strength
2.7
Product Quality
4.4
Market Position
2.0
Growth Velocity
5.0
Defensibility
5.0
Operational Safety
0.8
Founder Strength
3.0
Monetization Maturity
9.5
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.2★ across 157 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: High — 2.3% refund mentions, scam/fraud mentions detected, rating drift -0.90 ★ (recent 50 vs lifetime).
🎯 For competitors: Vulnerable. Quality drift + slow updates create a clear opening for a fresh competitor with active dev cadence.
💵 For acquirers: Estimated asking range 12-22× monthly = $6K-$11K. Discount applied for operational risk..
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 8 of 8 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| bugsREVIEW | −$1,800 | |
| excellent appREVIEW | +$1,500 | |
| slowREVIEW | −$1,200 | |
| Good rating (4.2★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (157 ratings)METRIC | +$400 | |
| Single-language (English only)METRIC | −$400 | |
| Growing app (1y old)METRIC | +$200 |
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.
App Specs
🔐 Own this app? Claim & verify MRR →💾 67 MB🔞 4+📱 iOS 15.1+🔖 v3.6.5🔄 updated 1mo ago🌐 EN📂 News💰 Free🚀 Launched 2024 (1y old)
📝 About this app
Linguin is an app for improving your target language with easy articles & stories with sound and podcasts with transcripts. It is designed to help you practice reading and listening in the language you are learning in an easy way (we have easy French, easy Spanish, easy German, easy Italian, easy Hindi or easy Japanese with Kanji and Furigana) and practice vocabulary. It is designed for intermediate language learners and offers a variety of texts to practice reading and listening skills. Linguin's method is called Comprehensible Input.… View full description on the official store →
🆕 What's New · v3.6.5
Hotfix: Language change in account overview fixed.
📅
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
⭐
Rating ↓ 4.00 → 3.13 (dropped 0.87★)
2026-03
⭐
Rating ↑ 3.10 → 4.00 (improved 0.90★)
2025-07
📈
Crossed 10 ratings — social-proof flywheel kicking in
2025-05
⭐
Rating ↑ 2.67 → 3.00 (improved 0.33★)
2025-02
⭐
Rating ↑ 2.20 → 2.67 (improved 0.47★)
2025-01
⭐
Rating ↓ 2.67 → 2.25 (dropped 0.42★)
2024-12
⭐
Rating ↓ 3.00 → 2.67 (dropped 0.33★)
2024-11
⭐
Rating ↑ 1.00 → 3.00 (improved 2.00★)
2024-11
🚀
First tracked snapshot — initial data captured
🗣
Voice of Customer
Based on 87 reviews across 6 markets● 66% positive · ● 13% neutral · ● 22% negative · Rating drift: -0.90★ (declining — recent 50: 3.3★ vs lifetime: 4.2★)
VADER compound sentiment per quarter (−1 = fully negative, +1 = fully positive). Each point ≥ 5 reviews.
Sentiment by country (−1 to +1)
🇺🇸 US
+0.55
🇬🇧 GB
+0.35
🇨🇦 CA
+0.32
🇦🇺 AU
+0.25
🇧🇷 BR
+0.07
🇩🇪 DE
-0.02
Top praise themes
flash cards ×3 learning ×15 reading ×14 language ×11 stories ×10 vocabulary ×8 read ×8 helpful ×7
Top complaint themes
free trial ×4 story ×8 read ×5 working ×5 content ×4 word ×4 reading ×4 work ×4
Risk signals
Refund mentions: 2.3% Bug mentions: 5% Fraud / scam mentions: 2.3%
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 4.20382★ | 157 | 4.20382★ this version |
| 🇬🇧 GB | 3.82692★ | 52 | 3.82692★ this version |
| 🇩🇪 DE | 3.95652★ | 23 | 3.95652★ this version |
| 🇫🇷 FR | 4.64286★ | 14 | 4.64286★ this version |
| 🇯🇵 JP | 5★ | 1 | 5★ this version |
| 🇨🇦 CA | 4.09615★ | 52 | 4.09615★ this version |
| 🇦🇺 AU | 3.86364★ | 22 | 3.86364★ this version |
| 🇧🇷 BR | 4.42647★ | 68 | 4.42647★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Linguin - Listening Practice
- Developer
- Bernard Jollans
- Bundle ID
- com.bjolly.linguin
- App Store URL
- Open in App Store
- Category
- News
- 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
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $148/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.
⭐Recent App Store Reviews32 latest · avg 3.22★ · 31.2% 5★ · 18.8% 1★
5★10 (31%)
4★5 (16%)
3★5 (16%)
2★6 (19%)
1★6 (19%)
+6 ratings/week
Praise: great ×8 love ×4 excellent ×2 best ×2 recommend ×1Complaints: bug ×2
Top positive
★★★★★ Very helpful learning tool
I enjoy reading every night in this app! It’s very helpful in helping me build my reading silks, vocabulary, and understanding the language’s natural flow. Love it!…
★★★★★ Access to text
All of the intended text is not available. Some of the text is hidden by the footers. The text is not visible because the page can not be moved upwards.…
Top negative
★☆☆☆☆ Too fast
Even the slowest introductory mode is way too fast. How am I supposed to learn French when they’re reading a mile a minute?…
★☆☆☆☆ I canceled within 1 hour and still got charged
They advertised a trial period and as soon as I tried it out I realized it was not what I expected so I canceled it within 1 hour of downloading it. I just got my bill saying they charged me for the month……
📈Ratings growth157 ratings+772% lifetimeShow 3-year history estimate ▾
Tracked (30 weeks) Pre-tracking estimate (24 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.
Full revenue analysis
Read the article-style breakdown for Linguin - Listening Practice: 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: 157 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does Linguin - Listening Practice make per month?▴
Based on our ML-calibrated revenue forecast, Linguin - Listening Practice earns approximately $148/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 Linguin - Listening Practice profitable?▴
With estimated build cost $80K and monthly revenue $148, Linguin - Listening Practice 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.
How many users does Linguin - Listening Practice have?▴
Estimated audience: ~16K lifetime downloads, ~2K monthly active users, and ~1K 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 Linguin - Listening Practice?▴
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 Linguin - Listening Practice built with?▴
Our heuristic places Linguin - Listening Practice on the Native iOS (SwiftUI) stack (Medium confidence, 70%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is Linguin - Listening Practice still actively maintained?▴
Maintenance status: Active (15% abandonment risk). Last shipped version was 1 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was Linguin - Listening Practice last updated?▴
Linguin - Listening Practice last shipped a new version on 2026-04-19 — 1 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Linguin - Listening Practice?▴
Linguin - Listening Practice is published by Bernard Jollans 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 Linguin - Listening Practice's BU Score?▴
Linguin - Listening Practice has a BU Score of 53/100 (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.