正一經書
59
Quality Score
Solid
正一經書
Medium confidence
✍️ bumetric analysis
“
正一經書 is an Android app from Windsails in the Books & Reference category, currently rated 4.9★ across 132 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 59: Solid (established niche player). For a Books & Reference 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
💡 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
$75K
↳ What it cost to build · not monthly revenue
Likely range $55K – $100K
$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 |
| ⚙ Books & Reference complexity ×0.95 | $-2525 |
| 🌐 Cross-platform reach (iOS + Android) | +$26K |
Total estimate
$75K
👥 Estimated audience size
14K
Lifetime downloads (US-equivalent)
Monthly active
1.4K
Daily active
280
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
| 📲 Books & Reference engagement | ~110 installs / rating |
| 🔁 Books & Reference D30 retention | 10% |
| 📍 DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
🔬
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 · 50/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
6.8
Market Position
0.0
Growth Velocity
5.0
Defensibility
7.5
Operational Safety
9.0
Founder Strength
6.7
Monetization Maturity
1.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.88★ across 132 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 262d 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 ($15K/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
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 (4.9★)METRIC | +$2,200 | |
| Mature app (13y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (132 ratings)METRIC | +$400 |
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
- 正一經書
- Developer
- Windsails
- Bundle ID
- gz.aas.zybooks
- App Store URL
- Open in App Store
- Category
- Books & Reference
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- aas4calcapps.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
- $288/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 growth132 ratings+17% 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
This program collects scriptures commonly used in daily life and work study of the Taoist school. It is convenient for you to read at any time when you are free or when you need it.
Adaptive to multiple screen sizes.
Scriptures currently included include:
Morning and evening homework lessons
Three official treasures
Beidou Zhenjing
Fortuna, Fortuna
The Book of Morality
Meridian
One of 100 Answers to Taoism
Questions and Answers
Questions and Answers Three of Taoism
Questions and Answers
Questions and Answers
Questions and Answers of Lu Xuedao Practice… View full description on the official store →
Adaptive to multiple screen sizes.
Scriptures currently included include:
Morning and evening homework lessons
Three official treasures
Beidou Zhenjing
Fortuna, Fortuna
The Book of Morality
Meridian
One of 100 Answers to Taoism
Questions and Answers
Questions and Answers Three of Taoism
Questions and Answers
Questions and Answers
Questions and Answers of Lu Xuedao Practice… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 vZYB_20250914_2330🔄 updated 0d ago📂 Books & Reference💰 Free📺 Ad-supported
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for 正一經書: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Windsails
View all →📦 Portfolio summaryINDIE studio
14apps·$15K/mocombined
✓ Diversified — top app contributes 22%; risk spread across portfolio
About this analysis
Why medium confidence: 132 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does 正一經書 make per month?▴
Based on our ML-calibrated revenue forecast, 正一經書 earns approximately $288/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 正一經書?▴
Browse the full Books & Reference 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 正一經書?▴
正一經書 is published by Windsails 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 正一經書's BU Score?▴
正一經書 has a BU Score of 59/100 (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.