早打ち英文法（中学英語・高校英語の英文法）
66
Quality Score
Solid
✍️ GetAppValue analysis
“
早打ち英文法（中学英語・高校英語の英文法） is an Android app from StudySwitch, Inc. in the Education category, currently rated 5.0★ across 1,712 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 66: Solid (established niche player). For a Education 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
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$110K
↳ What it cost to build · not monthly revenue
Likely range $80K – $150K
$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 |
| 💎 In-app purchase plumbing | +$9K |
| ⚙ Education complexity ×1.20 | +$11K |
| 🌐 Cross-platform reach (iOS + Android) | +$39K |
Total estimate
$110K
👥 Estimated audience size
145K
Lifetime downloads (US-equivalent)
Monthly active
26K
Daily active
7.8K
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
| 📲 Education engagement | ~85 installs / rating |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
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
Building · 59/100MID TIERcompetitive build-outGrowth Velocity
5.0
Founder Strength
5.8
Product Quality
9.0
Revenue Strength
3.7
Monetization Maturity
5.0
Defensibility
10.0
Market Position
0.0
Operational Safety
9.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 5.0★ across 1,712 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 322d ago — slow cadence.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 For competitors: Strong subscription moat. Hard to outcompete on retention. Better angle: free alternative with one-time purchase, or feature parity for an underserved sub-niche.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K.
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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (5.0★)METRIC | +$2,200 | |
| Low install base (1,712 ratings)METRIC | +$1,500 | |
| Mature app (13y old)METRIC | +$1,500 | |
| 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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- 早打ち英文法（中学英語・高校英語の英文法）
- Developer
- StudySwitch, Inc.
- Bundle ID
- jp.co.gakkonet.quizshooterenglishgrammar
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- www.studyswitch.co.jp
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $172/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $1.99 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.
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
Pop the balloons quickly and in the correct order to complete the sentence!
Easily master the classic English grammar taught in middle and high school with just this one app!
Each grammar point is repeatedly studied with five example sentences, so you'll naturally memorize it as you study.
Fill-in-the-blank questions have also been added.
You can review each grammar point one by one while reading the explanation.
Spelling questions are also included.
This app can also be used to practice irregular verb conjugations.
Starting with truly basic English grammar,… View full description on the official store →
Easily master the classic English grammar taught in middle and high school with just this one app!
Each grammar point is repeatedly studied with five example sentences, so you'll naturally memorize it as you study.
Fill-in-the-blank questions have also been added.
You can review each grammar point one by one while reading the explanation.
Spelling questions are also included.
This app can also be used to practice irregular verb conjugations.
Starting with truly basic English grammar,… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v8.5.0🔄 updated 0d ago📂 Education💰 Free📺 Ad-supported💎 IAP $1.99 per item
🔔
Track this app’s revenue
FREEGet an email when revenue moves by your threshold. No spam, unsubscribe in one click.
📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for 早打ち英文法（中学英語・高校英語の英文法）: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by StudySwitch, Inc.
View all →📦 Portfolio summaryINDIE studio
33apps·$1K/mocombined
✓ Diversified — top app contributes 18%; risk spread across portfolio
About this analysis
Why medium confidence: 1,712 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does 早打ち英文法（中学英語・高校英語の英文法） make per month?▴
Based on our ML-calibrated revenue forecast, 早打ち英文法（中学英語・高校英語の英文法） earns approximately $497/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.
What apps are like 早打ち英文法（中学英語・高校英語の英文法）?▴
Browse the full Education 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.
Who makes 早打ち英文法（中学英語・高校英語の英文法）?▴
早打ち英文法（中学英語・高校英語の英文法） is published by StudySwitch, Inc. 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 早打ち英文法（中学英語・高校英語の英文法）'s BU Score?▴
早打ち英文法（中学英語・高校英語の英文法） has a BU Score of 66/100 (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.