Hakunin Issyu FirstKaruta
5
Quality Score
Niche
✍️ bumetric analysis
“
Hakunin Issyu FirstKaruta is an Android app from PolygonDrill Ltd. in the Education category, currently rated — across few ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 5: Niche (micro-niche or pre-traction stage). For a Education app, 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
$200
per month
→
12-mo forecast
$100 – $931
per month
→
24-mo forecast
$100 – $2790
per month
MICRO 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
$95K
↳ What it cost to build · not monthly revenue
Likely range $70K – $130K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~3.2y at current MRR
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
$40K
↳ What it would sell for · not monthly revenue
Marketplace range $30K – $50K · 16× MRR multiple
💸
~0.4× 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 |
| 🏷 Education category multiple | +6% |
Final multiple
16× MRR
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$200/mo · ML-estimated from 234 triggers
Growth rate
+8.0% MoM · MICRO tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$127 – $508
12 months
$100 – $931
24 months
$100 – $2.8K
Compound growth at +8.0% MoM (tier baseline for MICRO). Range widens with horizon — typical noise band ±60% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Insufficient data · 31/100MICRO TIERtoo early to scoreRevenue Strength
2.3
Product Quality
0.0
Market Position
0.0
Growth Velocity
5.0
Defensibility
6.0
Operational Safety
7.0
Founder Strength
3.2
Monetization Maturity
1.0
- 💰 Revenue: Marginal — $0 - $500/mo · MICRO tier · indicative confidence, trajectory unclear.
- ⭐ Quality: None★ across 0 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 3674d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3674d 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 = $3K-$6K.
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.
📈 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
- Hakunin Issyu FirstKaruta
- Developer
- PolygonDrill Ltd.
- Bundle ID
- com.PolygonDrill.FirstKaruta
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- polygondrill.com
- 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
- $115/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.
✨AI Revenue EstimateCONFIDENCE: LOW
No public revenue data is available for the Android app "Hakunin Issyu FirstKaruta" by PolygonDrill Ltd. from the searched sources, including Sensor Tower, Statista, Adapty, Reddit, founder claims, or app review databases.
Sources mentioned: Sensor Tower, Statista, Adapty, Reddit
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
+++ 子供のための百人一首 強化アプリ +++
百首を多く感じさせない、多彩なメニューで暗記のお手伝い。読み札から説明文まですべて ふりがな付です。読み上げは女性の肉声で聞き取りやすい発音を心がけました。歌の意味も子供が読んでわかる表現にしています。
こどもが百人一首を覚える時の二大強敵
１）１００首って、多すぎる！
２）日本語なの？何言っているか分からない！意味も分からない！
これらの問題をすべて解決できます。
* 小さいグループに分けて覚える。
* 繰り返し、覚える。
* 成長をモチベーションの維持、向上につなげる。
* 意味を知ることで、より興味を持たせる。
本物の札を買う前に、お試しとしても最適！
+ メニューの紹介
＜かるたに慣れる＞
１００首という膨大な量を苦に感じさせないために、小さなグループに分けました。
このメニューでは、百人一首全首に触れることが目的です。
１つのグループを「文字」「意味」「音」「決まり字」「腕試し」と、繰り返し繰り返し
歌を体に馴染ませてゆきます。
説明文から歌、意訳に至るまで、すべてにフリガナがついているので、ひらがなが読める
お子様なら、一人で集中して遊べます。
歌の意味が分かれば、それは意味不明な呪文じゃなくなります。… View full description on the official store →
百首を多く感じさせない、多彩なメニューで暗記のお手伝い。読み札から説明文まですべて ふりがな付です。読み上げは女性の肉声で聞き取りやすい発音を心がけました。歌の意味も子供が読んでわかる表現にしています。
こどもが百人一首を覚える時の二大強敵
１）１００首って、多すぎる！
２）日本語なの？何言っているか分からない！意味も分からない！
これらの問題をすべて解決できます。
* 小さいグループに分けて覚える。
* 繰り返し、覚える。
* 成長をモチベーションの維持、向上につなげる。
* 意味を知ることで、より興味を持たせる。
本物の札を買う前に、お試しとしても最適！
+ メニューの紹介
＜かるたに慣れる＞
１００首という膨大な量を苦に感じさせないために、小さなグループに分けました。
このメニューでは、百人一首全首に触れることが目的です。
１つのグループを「文字」「意味」「音」「決まり字」「腕試し」と、繰り返し繰り返し
歌を体に馴染ませてゆきます。
説明文から歌、意訳に至るまで、すべてにフリガナがついているので、ひらがなが読める
お子様なら、一人で集中して遊べます。
歌の意味が分かれば、それは意味不明な呪文じゃなくなります。… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v1.42🔄 updated 0d ago📂 Education💰 Free
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📝 Description
95
BU Score · Transcendent
More by PolygonDrill Ltd.
View all →📦 Portfolio summaryINDIE studio
2apps·$172/mocombined
Lead-app heavy — top app contributes 67%
About this analysis
Why low confidence: only 0 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
Hakunin Issyu FirstKaruta is a very early-stage Android app in the education space with weak public traction — only 0 ratings, no founder-verified MRR, and not ranked in any monitored grossing chart. The app appears to be monetised, but public signals are too sparse for a precise revenue estimate.
Bottom line: treat all revenue, audience and acquisition-value numbers on this page as directional only — not founder-verified facts.
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Hakunin Issyu FirstKaruta make per month?▴
Low-confidence model estimate. Hakunin Issyu FirstKaruta has only 0 App Store ratings, so our revenue model has very little signal to work with — treat the ~$2.5K/mo figure as directional only, not a verified MRR. No founder-verified revenue data is available for this app. See methodology for the formula and confidence bands.
What apps are like Hakunin Issyu FirstKaruta?▴
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 Hakunin Issyu FirstKaruta?▴
Hakunin Issyu FirstKaruta is published by PolygonDrill 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 Hakunin Issyu FirstKaruta's BU Score?▴
Hakunin Issyu FirstKaruta has a BU Score of 5/100 (Niche). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.