Perfect English Grammar
62
Quality Score
Solid
Perfect English Grammar
Medium confidence
βοΈ bumetric analysis
“
Perfect English Grammar is an Android app from Fenls - Learn English, currently rated 4.8β across 518 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 62: 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.
π° Monthly revenue Β· now vs forecast
β Right now
$500
per month
β
12-mo forecast
$437 β $1575
per month
β
24-mo forecast
$405 β $3644
per month
INDIE tier
π‘ Grow this revenue
Free AI audit of this appβs store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5Γ organic installs
π Performance Tracking LIVE
Loadingβ¦
Rating
β
Reviews
β
Forecast Revenue / mo
β
Snapshots tracked
0
since first record
ONE-TIME Β· BUILD
π° Estimated build cost
$80K
β³ What it cost to build Β· not monthly revenue
Likely range $60K β $110K
$25K Β· MVP floor
$100K Β· indie scale
$500K+ Β· studio build
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age Γ team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 𧱠MVP baseline (design + 1-store ship) | +$28K |
| π± 5 unique screens Γ $4.5K | +$22K |
| π Cross-platform reach (iOS + Android) | +$27K |
Total estimate
$80K
π₯ Estimated audience size
77K
Lifetime downloads (US-equivalent)
Monthly active
11K
Daily active
2.3K
Synthetic estimate from ratings Γ category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent β true global audience can be 5-10Γ larger for international apps. Full math + source list on /methodology.
How we sized it
| π² category engagement | ~150 installs / rating |
| π category D30 retention | 15% |
| π DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
π Estimated tech stack
π€
Native Android (Kotlin)
High confidence Β· 80%
Also possible
Flutter
Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries β 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
| π· Category context | category |
| π¦ Compact Android bundle | β Native Kotlin |
π¬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo Β· ML-estimated from 234 triggers
Growth rate
+6.0% MoM Β· INDIE tier baseline (compound monthly)
6 months
$426 β $993
12 months
$437 β $1.6K
24 months
$405 β $3.6K
Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon β typical noise band Β±40% at 6mo.. Ranges widen with horizon β distant futures carry more uncertainty.
π
BU Investment Matrix
Early-stage solo Β· 46/100INDIE TIERexpected for tierRevenue Strength
2.7
Product Quality
6.8
Market Position
0.0
Growth Velocity
5.0
Defensibility
5.0
Operational Safety
10.0
Founder Strength
6.0
Monetization Maturity
1.0
- π° Revenue: Marginal β $200 - $1250/mo Β· INDIE tier Β· medium confidence, trajectory unclear.
- β Quality: 4.83β across 518 reviews β solid.
- π Market: Not yet charting in any of the 9 monitored markets.
- π Growth: Insufficient signal to assess trajectory.
- β οΈ Risk: Low β no material risk signals detected.
π― For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge β otherwise crowded segment.
π΅ For acquirers: Estimated asking range 18-32Γ monthly = $9K-$16K. Portfolio play ($3K/mo combined) commands premium.
Composite of 8 dimensions computed deterministically from public signals β no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
Range:
π° Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
π¬Forecast Breakdown β Why This Estimate?Top 3 of 3 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.8β )METRIC | +$2,200 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (518 ratings)METRIC | +$400 |
METRIC = structural app data Β· REVIEW = mined from user reviews Β· β VERIFIED = Stripe-verified anchor (TrustMRR)
π Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
β Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
Profile & Insights
Everything we know β and don't β about this app and its company.
Identification
- App name
- Perfect English Grammar
- Developer
- Fenls - Learn English
- Bundle ID
- com.fenls.perfectenglishgrammar
- App Store URL
- Not found
- Category
- Not found
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- Not found
- 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
- Not found
- 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.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" β additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
π About this app
<b>Elevate Your English with Our Premier Language Learning App! </b>π
<b>Facing Challenges with English? Hereβs Your Solution!</b>
Whether you're a teenager or an adult finding English grammar perplexing, our app tailors to everyoneβfrom self-learners to students in educational environments or those gearing up for exams like IELTS or TOEFL. Our focus is on making complex grammatical elements such as articles, prepositions, verbs, pronouns, and adjectives straightforward and manageable.
<b>The Ultimate Tool for Overcoming Grammar Obstacles</b>β¦ View full description on the official store β
<b>Facing Challenges with English? Hereβs Your Solution!</b>
Whether you're a teenager or an adult finding English grammar perplexing, our app tailors to everyoneβfrom self-learners to students in educational environments or those gearing up for exams like IELTS or TOEFL. Our focus is on making complex grammatical elements such as articles, prepositions, verbs, pronouns, and adjectives straightforward and manageable.
<b>The Ultimate Tool for Overcoming Grammar Obstacles</b>β¦ View full description on the official store β
π vVaries with deviceπ° Free / Ads / IAP
π
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π Description
95
BU Score Β· Transcendent
Full revenue analysis
Read the article-style breakdown for Perfect English Grammar: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Fenls - Learn English
View all βπ¦ Portfolio summaryINDIE studio
21appsΒ·$3K/mocombined
β Diversified β top app contributes 10%; risk spread across portfolio
About this analysis
Why medium confidence: 518 ratings Β· no founder-verified revenue (model estimate only).
β Frequently Asked Questions
2 answers Β· auto-generated from this app's public dataWho makes Perfect English Grammar?β΄
Perfect English Grammar is published by Fenls - Learn English 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 Perfect English Grammar's BU Score?β΄
Perfect English Grammar has a BU Score of 62/100 (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.