Who makes ぜったい覚える！英検４級単語帳?

ぜったい覚える！英検４級単語帳 is published by Ubacoda 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.

ぜったい覚える！英検４級単語帳

Quality Score

Niche

ぜったい覚える！英検４級単語帳

Low confidence

— ✍️ Editor

✍️ bumetric analysis

“

ぜったい覚える！英検４級単語帳 is an Android app from Ubacoda, currently rated — across few ratings. Initial signal reads as no scraped reviews yet: judgment based on metadata only.

Quality Score is 0: Niche (micro-niche or pre-traction stage). For an app like this, that means micro-niche or pre-traction stage. 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 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

Run free AI audit →

Typical impact: +2-5× organic installs

📊 Performance Tracking LIVE

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idle

Rating

—

Reviews

—

Forecast Revenue / mo

—

Snapshots tracked

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

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
🌐 Cross-platform reach (iOS + Android)	+$27K

Total estimate $80K

🛠 Estimated tech stack

🤖

Native Android (Kotlin)

High confidence · 80%

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

🏷 Category context	category
📦 Compact Android bundle	→ Native Kotlin

🔬

How we forecast this revenue

LOW CONFIDENCE

Baseline

$500/mo · ML-estimated from 234 triggers

Growth rate

+6.0% MoM · INDIE tier baseline (compound monthly)

Direction

Headwinds: rating drift may slow acquisition

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

Pre-traction · 37/100INDIE TIERlimited signal

Revenue Strength

2.7

Product Quality

0.0

Market Position

0.0

Growth Velocity

5.0

Defensibility

5.0

Operational Safety

10.0

Founder Strength

5.5

Monetization Maturity

1.0

💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
⭐ Quality: None★ across 0 reviews — weak — significant quality concerns.
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: Insufficient signal to assess trajectory.
⚠️ 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 = $9K-$16K. Portfolio play ($1K/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.

📥 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: ぜったい覚える！英検４級単語帳
Developer: Ubacoda
Bundle ID: com.ubacoda.eiken4
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" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

📝 About this app

３７１個の英単語をフォルダでまとめてあるので、少しずつ、確実に単語を覚えることができます。覚えられない単語には付箋をつけて、苦手な単語のみを集中して復習することもできるので、とっても便利。シャッフル機能も使えば、より確実に単語を覚えることができます。

スワイプでスムーズなページの移動ができ、移動時間や隙間時間にさっと単語帳を起動し、復習することができます。

英検４級合格を目指す人の、必須アプリです！

ストレスフリー、効率のいい英検４級のための単語帳といえばこれ！

主な機能

・フォルダごとに単語を整理され、小分けにされている

・簡単操作でサクサク起動、即学習開始！

・見やすい、読みやすい、シンプルなデザイン

・アルファベット順でも、シャッフルしてランダムな順でも学習できる

・付箋・ブックマーク機能付きで、覚えにくい単語は何度も練習できる

・自動再生機能付きでスワイプしてページをめくる手間なし

・カードの裏表をひっくり返せるので、日本語>英語、英語>日本語の学習ができる

・カードごとにメモを記入できるので、例文などの記載に便利！

便利な機能満載の「ぜったい覚える！英検４級単語帳」。これさえ覚えれば合格間違いなし！