66
Quality Score
Solid
Plumber's Handbook: Guide
✍️ bumetric analysis
“
Plumber's Handbook: Guide is an Android app from SergeyV Apps in the Books & Reference category, currently rated 4.6★ across 8,273 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 66: 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.
💰 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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD💰 Estimated build cost
$120K
↳ What it cost to build · not monthly revenue
Likely range $90K – $160K
$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 |
| 💎In-app purchase plumbing | +$9K |
| ⚙Books & Reference complexity ×0.95 | $-2975 |
| 🌐Cross-platform reach (iOS + Android) | +$31K |
| ⚙5.1y maintenance × ~1-person team | +$30K |
Total estimate$120K
👥 Estimated audience size
675K
Lifetime downloads (US-equivalent)
Monthly active
54K
Daily active
10K
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 |
| 📅5.1y of rating accumulation | -26% |
| 🔁Books & Reference D30 retention | 10% |
| 📍DAU / MAU stickiness | 0.20 |
DAU / MAU19% sticky
🛠 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 | Books & Reference |
| 📦Compact Android bundle | → Native Kotlin |
💀 Maintenance status
Likely abandoned
72%
Last shipped 2024-10-25 · 575 days ago
0 · Active50 · At risk100 · Abandoned
Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.
Risk signals
| 📅1y 7mo since last update | Likely deprioritized |
VerdictLikely abandoned
🔬
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 · 55/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
8.4
Market Position
0.0
Growth Velocity
5.0
Defensibility
8.8
Operational Safety
7.0
Founder Strength
5.9
Monetization Maturity
5.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.64★ across 8,273 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 575d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (575d since update).
🎯 For competitors: Strong subscription moat. Hard to outcompete on retention. Better angle: free alternative with one-time purchase, or feature parity for an underserved sub-niche.
💵 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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.6★)METRIC | +$2,200 | |
| Low install base (8,273 ratings)METRIC | +$1,500 | |
| Established app (5y old)METRIC | +$800 | |
| 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 →🔖 v29.0🔄 updated 1y ago📂 Books & Reference💰 Free📺 Ad-supported💎 IAP $1.99 per item🚀 Launched 2021 (5y old)
📝 About this app
The application contains various articles and tips for all those who work with plumbing or are simply interested in this area. The application is suitable for DIYers, professionals, and amateurs.
There are many illustrations to help you understand the intricacies of the plumbing profession.
There are 2 sections in the application:
1. Theory 📘
2. Practice 🛠️
■ The first section contains detailed information on plumbing equipment that is installed in an apartment or private house. Information about the heating of the house, water supply, sewerage.… View full description on the official store →
There are many illustrations to help you understand the intricacies of the plumbing profession.
There are 2 sections in the application:
1. Theory 📘
2. Practice 🛠️
■ The first section contains detailed information on plumbing equipment that is installed in an apartment or private house. Information about the heating of the house, water supply, sewerage.… View full description on the official store →
🧪
Tech & Domain Intel — j2f18ab60.app-ads-txt.com
- Mail provider
- Google Workspace
- Tech stack
- Google Workspace
Derived from public RDAP + DNS TXT records (no scraping, no login).
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Plumber's Handbook: Guide
- Developer
- SergeyV Apps
- Bundle ID
- sergeiv.plumberhandbook
- App Store URL
- Open in App Store
- Category
- Books & Reference
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- j2f18ab60.app-ads-txt.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
- $242/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $1.99 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 growth8,273 ratings+60% lifetimeShow 3-year history estimate ▾
Tracked (1 weeks) Pre-tracking estimate (35 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 SergeyV Apps
View all →📦 Portfolio summaryINDIE studio
11apps·$2K/mocombined
✓ Diversified — top app contributes 16%; risk spread across portfolio
Full revenue analysis
Read the article-style breakdown for Plumber's Handbook: Guide: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does Plumber's Handbook make per month?▾
Based on our ML-calibrated revenue forecast, Plumber's Handbook earns approximately $241/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.
Is Plumber's Handbook profitable?▾
With estimated build cost $120K and monthly revenue $241, Plumber's Handbook looks well below break-even — current monthly revenue is much smaller than the estimated build cost. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Plumber's Handbook have?▾
Estimated audience: ~675K lifetime downloads, ~54K monthly active users, and ~10K daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.
What apps are like Plumber's Handbook?▾
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.
What is Plumber's Handbook built with?▾
Our heuristic places Plumber's Handbook on the Native Android (Kotlin) stack (High confidence, 80%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is Plumber's Handbook still actively maintained?▾
Maintenance status: Likely abandoned (72% abandonment risk). Last shipped version was 1+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was Plumber's Handbook last updated?▾
Plumber's Handbook last shipped a new version on 2024-10-25 — more than 1 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Plumber's Handbook?▾
Plumber's Handbook is published by SergeyV Apps 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 Plumber's Handbook's BU Score?▾
Plumber's Handbook has a BU Score of 66/100 (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.