How much does 知らないと恥ずかしい大人の語彙力 make per month?

Based on our ML-calibrated revenue forecast, 知らないと恥ずかしい大人の語彙力 earns approximately $606/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 知らないと恥ずかしい大人の語彙力?

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 知らないと恥ずかしい大人の語彙力?

知らないと恥ずかしい大人の語彙力 is published by nullhouse 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 知らないと恥ずかしい大人の語彙力's BU Score?

知らないと恥ずかしい大人の語彙力 has a BU Score of 67/100 (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.

知らないと恥ずかしい大人の語彙力

Quality Score

Solid

知らないと恥ずかしい大人の語彙力

Name: 知らないと恥ずかしい大人の語彙力 — app revenue, audience, build cost & risk profile
Creator: bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: 知らないと恥ずかしい大人の語彙力 revenue, 知らないと恥ずかしい大人の語彙力 app analytics, mobile app revenue estimate, Education revenue, Android app revenue

Medium confidence

5.0 ✍️ Editor

✍️ bumetric analysis

“

知らないと恥ずかしい大人の語彙力 is an Android app from nullhouse in the Education category, currently rated 5.0★ across 2,563 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Quality Score is 67: 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

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Screenshots, ratings, reviews strategy

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Typical impact: +2-5× organic installs

📊 Performance Tracking LIVE

Loading…

idle

Rating

—

Reviews

—

Forecast Revenue / mo

—

Snapshots tracked

since first record

ONE-TIME · BUILD 💰 Estimated build cost

$95K

↳ What it cost to build · not monthly revenue

Likely range $70K – $130K

$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
⚙ Education complexity ×1.20	+$10K
🌐 Cross-platform reach (iOS + Android)	+$33K

Total estimate $95K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$10K

↳ What it would sell for · not monthly revenue

Marketplace range $10K – $15K · 18× 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%
🏷 Education category multiple	+6%

Final multiple 18× MRR

👥 Estimated audience size

215K

Lifetime downloads (US-equivalent)

Monthly active

38K

Daily active

11K

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 CONFIDENCE

Baseline

$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

Below median · 52/100MID TIERunderperforming peers

Revenue Strength

3.7

Product Quality

9.0

Market Position

0.0

Growth Velocity

5.0

Defensibility

7.0

Operational Safety

9.0

Founder Strength

6.6

Monetization Maturity

1.0

💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
⭐ Quality: 5.0★ across 2,563 reviews — exceptional (top 1% in category).
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: last update 295d ago — slow cadence.
⚠️ Risk: Low — no material risk signals detected.

🎯 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 = $90K-$160K. Portfolio play ($14K/mo combined) commands premium.

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

MODEL

Revenue 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 (2,563 ratings)METRIC		+$1,500
Mature app (8y old)METRIC		+$1,500
Ad-supported / freemiumMETRIC		+$600

METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📥 Estimated Downloads / week

PROXY · ratings × 50/wk —

Industry-rule estimate (Sensor Tower / data.ai): one weekly install ≈ 50 new ratings. Solid points = tracked snapshots · faded line = pre-tracking model backfill.

📈 Reviews Growth

LIVE

Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE

Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY

Each bar shows a tracked update and the metric delta from the previous snapshot.

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name: 知らないと恥ずかしい大人の語彙力
Developer: nullhouse
Bundle ID: info.nullhouse.vocabulary
App Store URL: Open in App Store
Category: Education
Content rating: Not found
Languages: Not found

Company

Website: nullhouse.info
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: $607/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.

📈Ratings growth2,563 ratings+35% lifetimeShow 3-year history estimate ▾

Tracked (1 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value

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

☆Before embarrassing yourself in public!

Even if you think you know it, you might remember it wrongly.

Solve the quiz and improve your brain before you use Japanese incorrectly!

There are also idioms, proverbs and idioms that you never knew before! ?

☆ Vocabulary quiz familiar with TV quiz programs!

・What is the meaning of the waistband that is attached to eyebrows, miso, and cremation?

・"Suburaku" does not mean "everything". How do you really use it?

・Involved in our company's ___. What words are underlined?

・How would you politely express “I accidentally forgot”?… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

🔖 v2.5.0🔄 updated 0d ago📂 Education💰 Free📺 Ad-supported

🧪

Tech & Domain Intel — nullhouse.info

Tech stack: Google Workspace

Derived from public RDAP + DNS TXT records (no scraping, no login).

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

Read the article-style breakdown for 知らないと恥ずかしい大人の語彙力: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.

Read deep-dive →