54
Quality Score
Solid
雀姬（日本麻雀）
✍️ bumetric analysis
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雀姬（日本麻雀） is an Android app from Alpha Sparrow in the Card category, currently rated 3.6★ across 2,947 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 54: Solid (established niche player). For a Card 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.
💰 Revenue · today and ahead
Today
$5.0K/mo
In 12 months
$5.2K – $10.8K
In 24 months
$6.4K – $19.2K
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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
🔬
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
Below median · 52/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
6.6
Market Position
0.0
Growth Velocity
5.0
Defensibility
8.2
Operational Safety
10.0
Founder Strength
4.0
Monetization Maturity
4.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 3.65★ across 2,947 reviews — solid.
- 📍 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 = $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 3 of 3 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Low install base (2,947 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)
📈 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.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v3.84.1🔄 updated 3mo ago📂 Card💰 Free💎 IAP $0.99 - $99.99 per item🚀 Launched 2017 (8y old)
📝 About this app
Seven years have passed since the mahjong parlor first opened its doors to customers. In these 2500+ days and nights, we've played mahjong together, winning big and losing together. Some have gone from campus to the workplace, some from novices to seasoned mahjong players. Thank you for leaving precious fragments of your lives in *Mahjong Princess*.
Seven years is a test for any relationship, but for us, it has fostered an irreplaceable understanding. In the new year, let's play even better hands and have even more exciting games together.… View full description on the official store →
Seven years is a test for any relationship, but for us, it has fostered an irreplaceable understanding. In the new year, let's play even better hands and have even more exciting games together.… View full description on the official store →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- 雀姬（日本麻雀）
- Developer
- Alpha Sparrow
- Bundle ID
- com.jacksparrow.jpmajiang
- App Store URL
- Open in App Store
- Category
- Card
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- www.queji.tw
- 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
- $595/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $0.99 - $99.99 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.
📈Ratings growth2,947 ratings+31% lifetimeShow 3-year history estimate ▾
Tracked (1 weeks) Pre-tracking estimate (36 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.
More by Alpha Sparrow
View all →📦 Portfolio summaryINDIE studio
2apps·$1K/mocombined
Lead-app heavy — top app contributes 58%
Full revenue analysis
Read the article-style breakdown for 雀姬（日本麻雀）: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.