How much does Library of Babel 3D make per month?

Based on our ML-calibrated revenue forecast, Library of Babel 3D earns approximately $200/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 Library of Babel 3D profitable?

With estimated build cost $130K and monthly revenue $200, Library of Babel 3D 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 Library of Babel 3D have?

Estimated audience: ~17K lifetime downloads, ~990 monthly active users, and ~190 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 Library of Babel 3D?

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 Library of Babel 3D built with?

Our heuristic places Library of Babel 3D 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 Library of Babel 3D still actively maintained?

Maintenance status: At risk (60% abandonment risk). Last shipped version was 11 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.

When was Library of Babel 3D last updated?

Library of Babel 3D last shipped a new version on 2025-10-04 — 11 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.

Who makes Library of Babel 3D?

Library of Babel 3D is published by Keiwan Donyagard 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 Library of Babel 3D's BU Score?

Library of Babel 3D has a BU Score of 54/100 (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.

Library of Babel 3D

Quality Score

Solid

Library of Babel 3D

Name: Library of Babel 3D — app revenue, audience, build cost & risk profile
Creator: Bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Library of Babel 3D revenue, Library of Babel 3D app analytics, mobile app revenue estimate, Books & Reference revenue, Android app revenue

by Keiwan Donyagard

Medium confidence

4.2 Google Play rating

✍️ Bumetric analysis

“

Library of Babel 3D is an Android app from Keiwan Donyagard in the Books & Reference category, currently rated 4.2★ across 229 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Quality Score is 54: 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

$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

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Typical impact: +2-5× organic installs

📊 Performance Tracking LIVE

2 snapshots on record

idle

Rating

4.2

Reviews

229 reviews

Forecast Revenue / mo

$200

Snapshots tracked

since May 2026

ONE-TIME · BUILD 💰 Estimated build cost

$130K

↳ What it cost to build · not monthly revenue

Likely range $100K – $175K

$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
⚙ 9.2y maintenance × ~1-person team	+$55K

Total estimate $130K

👥 Estimated audience size

17K

Lifetime downloads (US-equivalent)

Monthly active

990

Daily active

190

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
📅 9.2y of rating accumulation	-30%
🔁 Books & Reference D30 retention	10%
📍 DAU / MAU stickiness	0.20

DAU / MAU 19% 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

At risk

60%

Last shipped 2025-10-04 · 355 days ago

0 · Active 50 · At risk 100 · 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

📅 11 months since last update	Concerning gap
👥 Small user base (229 ratings) + 9.2y old	+10% (solo-project pattern)

Verdict At risk

🔬

How we forecast this revenue

LOW CONFIDENCE

Baseline

$200/mo · ML-estimated from 234 triggers

Growth rate

+8.0% MoM · MICRO tier baseline (compound monthly)

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 · 38/100MICRO TIERtoo early to score

Growth Velocity

5.0

Founder Strength

3.4

Product Quality

5.9

Revenue Strength

2.3

Monetization Maturity

1.0

Defensibility

3.5

Market Position

0.0

Operational Safety

9.0

💰 Revenue: Marginal — $0 - $500/mo · MICRO tier · indicative confidence, trajectory unclear.
⭐ Quality: 4.22★ across 222 reviews — below category median.
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: last update 351d 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 = $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

MODEL

Revenue 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 6 of 6 triggers

Our ML model uses 200+ signals from public data. These are the most influential for this app:

bugsREVIEW		−$1,800
5 starREVIEW		+$1,800
Mature app (9y old)METRIC		+$1,500
Good rating (4.2★)METRIC		+$800
Ad-supported / freemiumMETRIC		+$600
Early-stage install base (229 ratings)METRIC		+$400

METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📥 Estimated Downloads / week

PROXY · ratings × 50/wk —

Industry-rule estimate (Sensor Tower / data.ai): one weekly install ≈ 50 new ratings. Solid points = tracked snapshots · faded line = pre-tracking model backfill.

📈 Reviews Growth

LIVE

Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE

Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY

Each bar shows a tracked update and the metric delta from the previous snapshot.

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name: Library of Babel 3D
Developer: Keiwan Donyagard
Bundle ID: com.keiwando.libraryofbabel
App Store URL: Open in App Store
Category: Books & Reference
Content rating: Not found
Languages: Not found

Company

Website: keiwan.itch.io
Tagline: Not found
Description: Not found
Founded: Not found
HQ / Address: Not found
Employees: Not found
Logo: Not found

Revenue

Reported revenue signal / mo: Not found
AI revenue estimate / mo: Not found
AI annual estimate: Not found
Model estimate / mo: $200/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.

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

In the Library of Babel you can find any page of text that can be written down using the combination of the 26 lowercase letters of the English alphabet and the comma, period and space. 

Every meaningful and meaningless thought exists in some book on one of the five shelves on one of the four walls in one of the many hexagonal rooms somewhere deep within the Library of Babel. But for every page of meaningful content, there are also billions and trillions of pages full of "gibberish". 

The librarians of this library spend all of their lives reading the books in the search for wisdom.… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

🔖 v3.1.2🔄 updated 11mo ago📂 Books & Reference💰 Free🚀 Launched 2017 (9y old)

📅

What Worked™ · Development Pipeline

2 EVENTS TRACKED

Detected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →

2026-09

📸

Refreshed store screenshots — 5 of 5 updated

2026-05

🚀

First tracked snapshot — initial data captured

📸

Store Page History

5 SCREENSHOT CHANGES

Every time a developer swaps a store screenshot we archive both versions. Compare side-by-side to see what messaging / visuals changed.

iPhone screenshots

Slot 1
2 ver.

2026-05-08

Now

2026-09-22

Slot 2
2 ver.

2026-05-08

Now

2026-09-22

Slot 3
2 ver.

2026-05-08

Now

2026-09-22

Slot 4
2 ver.

2026-05-08

Now

2026-09-22

Slot 5
2 ver.

2026-05-08

Now

2026-09-22

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

Read the article-style breakdown for Library of Babel 3D: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.

Read deep-dive →