My Library
58
Quality Score
Solid
My Library
Medium confidence
✍️ bumetric analysis
“
My Library is an Android app from Mika Rebensburg in the Books & Reference category, currently rated 4.3★ across 1,271 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 58: 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
$140K
↳ What it cost to build · not monthly revenue
Likely range $105K – $190K
$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 |
| ⚙8.5y maintenance × ~1-person team | +$51K |
Total estimate$140K
ONE-TIME · EXIT VALUE💵 Estimated acquisition value
$20K
↳ What it would sell for · not monthly revenue
Marketplace range $15K – $25K · 33× MRR multiple
💸~0.1× build cost (under-water)
Synthetic estimate. Multiple band derived from iap / freemium model + 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
| 💎IAP / freemium model base | 28× MRR |
| 📅8.5y proven track record | +20% |
| 🏷Books & Reference category multiple | -2% |
Final multiple33× MRR
👥 Estimated audience size
97K
Lifetime downloads (US-equivalent)
Monthly active
5.9K
Daily active
1.1K
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 |
| 📅8.5y of rating accumulation | -30% |
| 🔁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 |
🔬
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 · 54/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
3.8
Product Quality
7.7
Revenue Strength
3.7
Monetization Maturity
5.0
Defensibility
8.1
Market Position
0.0
Operational Safety
10.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.29★ across 1,271 reviews — strong (top 10%).
- 📍 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: 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:
| Low install base (1,271 ratings)METRIC | +$1,500 | |
| Mature app (8y old)METRIC | +$1,500 | |
| Good rating (4.3★)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 →🔖 vVaries with device📂 Books & Reference💰 Free📺 Ad-supported💎 IAP $1.49 per item🚀 Launched 2017 (8y old)
📝 About this app
This library app is here for you to finally have your books organized - in a library of books that is on your phone and therefore always with you.
Have a list of your books packed in one library:
Scan their barcode and automatically get all of their information
(Or add them manually).
Rate them, add a description and much more!
Features:
- Book Library
- Listing
- Sorting and Searching library
- Wish list
- Reminders for lent books
- Exporting
- Backups
We appreciate your Feedback!
Library
Note: With this library app, you cannot read or download books.… View full description on the official store →
Have a list of your books packed in one library:
Scan their barcode and automatically get all of their information
(Or add them manually).
Rate them, add a description and much more!
Features:
- Book Library
- Listing
- Sorting and Searching library
- Wish list
- Reminders for lent books
- Exporting
- Backups
We appreciate your Feedback!
Library
Note: With this library app, you cannot read or download books.… View full description on the official store →
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- My Library
- Developer
- Mika Rebensburg
- Bundle ID
- com.rebensburgsolutions.booklibrary
- App Store URL
- Open in App Store
- Category
- Books & Reference
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- rebensburgsolutions.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
- $540/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $1.49 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 growth1,271 ratings+42% 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.
📝 Description
95
BU Score · Transcendent
❓ Frequently Asked Questions
Who is the author of The ?
The author is , a prominent figure in the study of occult philosophy and esoteric traditions.
What is the main theme of the book?
The main theme is the esoteric interpretation of the Book of Revelation, focusing on the mystical and symbolic meanings hidden within the text.
Why is this book important for modern esoteric seekers?
This book is important because it bridges ancient wisdom with contemporary spiritual practices, providing valuable insights into the esoteric traditions that have influenced Western spirituality.
More by Mika Rebensburg
View all →📦 Portfolio summaryINDIE studio
2apps·$675/mocombined
⚠ Concentrated — top app contributes 80% of combined revenue (single-app dependency)
Full revenue analysis
Read the article-style breakdown for My Library: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why medium confidence: 1,271 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
8 answers · auto-generated from this app's public dataHow much does My Library make per month?▴
Based on our ML-calibrated revenue forecast, My Library earns approximately $539/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 My Library profitable?▴
With estimated build cost $140K and monthly revenue $539, My Library 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 My Library have?▴
Estimated audience: ~97K lifetime downloads, ~5K monthly active users, and ~1K 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 My Library?▴
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 My Library built with?▴
Our heuristic places My Library 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.
How much would My Library sell for?▴
Estimated acquisition value: $20K (marketplace range $15K – $25K). Calculated as 33× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.
Who makes My Library?▴
My Library is published by Mika Rebensburg 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 My Library's BU Score?▴
My Library has a BU Score of 58/100 (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.