SCHOOL OF LOCK!
66
Quality Score
Solid
✍️ GetAppValue analysis
“
SCHOOL OF LOCK! is an Android app from TOKYO FM Broadcasting Co., Ltd. in the Entertainment category, currently rated 5.0★ across 1,415 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 66: Solid (established niche player). For a Entertainment 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
$591
per month
→
12-mo forecast
$517 – $1863
per month
→
24-mo forecast
$479 – $4310
per month
INDIE 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
$100K
↳ What it cost to build · not monthly revenue
Likely range $75K – $135K
$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 |
| ⚙ Entertainment complexity ×1.30 | +$15K |
| 🌐 Cross-platform reach (iOS + Android) | +$36K |
Total estimate
$100K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$10K
↳ What it would sell for · not monthly revenue
Marketplace range $5K – $15K · 16× MRR multiple
💸
~0.1× build cost (under-water)
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 |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Entertainment category multiple | -5% |
Final multiple
16× MRR
👥 Estimated audience size
210K
Lifetime downloads (US-equivalent)
Monthly active
25K
Daily active
10K
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
| 📲 Entertainment engagement | ~150 installs / rating |
| 🔁 Entertainment D30 retention | 12% |
| 📍 DAU / MAU stickiness | 0.40 |
DAU / MAU
40% sticky
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$591/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
6 months
$503 – $1.2K
12 months
$517 – $1.9K
24 months
$479 – $4.3K
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 · 43/100INDIE TIERexpected for tierGrowth Velocity
5.0
Founder Strength
3.2
Product Quality
9.0
Revenue Strength
2.8
Monetization Maturity
1.0
Defensibility
6.0
Market Position
0.0
Operational Safety
7.0
- 💰 Revenue: Marginal — $236 - $1478/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 5.0★ across 1,415 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 2725d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (2725d 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 = $10K-$18K.
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 (1,415 ratings)METRIC | +$1,500 | |
| Mature app (14y 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
- SCHOOL OF LOCK!
- Developer
- TOKYO FM Broadcasting Co., Ltd.
- Bundle ID
- com.tfm.sol
- App Store URL
- Open in App Store
- Category
- Entertainment
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- www.tfm.co.jp
- 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
- $172/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.
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
A school in the radio that holds the key to the future, SCHOOL OF LOCK!
From every Monday to Friday from 22:00, the principal, Sakakata Komori, will hold classes with you all over the country!
Super popular artists appear one after another every day. Launch the app and go to the school bulletin board & each artist bulletin board first!
Please write anything you think, feel, worry, friends, family, or your favorite person!
(C) TOKYO FM
From every Monday to Friday from 22:00, the principal, Sakakata Komori, will hold classes with you all over the country!
Super popular artists appear one after another every day. Launch the app and go to the school bulletin board & each artist bulletin board first!
Please write anything you think, feel, worry, friends, family, or your favorite person!
(C) TOKYO FM
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v2.0.2.1🔄 updated 0d ago📂 Entertainment💰 Free📺 Ad-supported
🧪
Tech & Domain Intel — tfm.co.jp
- Tech stack
- Apple Pay / Sign in with Apple · Google Workspace · AWS SES
Derived from public RDAP + DNS TXT records (no scraping, no login).
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for SCHOOL OF LOCK!: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by TOKYO FM Broadcasting Co., Ltd.
View all →📦 Portfolio summaryINDIE studio
2apps·$172/mocombined
⚠ Concentrated — top app contributes 100% of combined revenue (single-app dependency)
About this analysis
Why medium confidence: 1,415 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does SCHOOL OF LOCK! make per month?▴
Based on our ML-calibrated revenue forecast, SCHOOL OF LOCK! earns approximately $591/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 SCHOOL OF LOCK!?▴
Browse the full Entertainment 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 SCHOOL OF LOCK!?▴
SCHOOL OF LOCK! is published by TOKYO FM Broadcasting Co., Ltd. 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 SCHOOL OF LOCK!'s BU Score?▴
SCHOOL OF LOCK! 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.