How much does Littmann™ Learning make per month?

Based on our ML-calibrated revenue forecast, Littmann™ Learning earns approximately $459/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 Littmann™ Learning?

Browse the full Education 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 Littmann™ Learning?

Littmann™ Learning is published by CSD Labs on the Apple App 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 Littmann™ Learning's BU Score?

Littmann™ Learning has a BU Score of 63/100 (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.

Littmann™ Learning

Quality Score

Solid

Littmann™ Learning

Name: Littmann™ Learning — app revenue, audience, build cost & risk profile
Creator: bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Littmann™ Learning revenue, Littmann™ Learning app analytics, mobile app revenue estimate, Education revenue, iOS app revenue

Medium confidence

4.9 ✍️ Editor

✍️ bumetric analysis

“

Littmann™ Learning is an iOS app from CSD Labs in the Education category, currently rated 4.9★ across 823 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Quality Score is 63: Solid (established niche player). For a Education 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

$6.9K

per month

→

12-mo forecast

$6.0K – $21.6K

per month

→

24-mo forecast

$5.5K – $49.9K

per month

INDIE tier

💡 Grow this revenue

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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

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idle

Rating

—

Reviews

—

Forecast Revenue / mo

—

Snapshots tracked

since first record

ONE-TIME · BUILD 💰 Estimated build cost

$60K

↳ What it cost to build · not monthly revenue

Likely range $45K – $80K

$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
⚙ Education complexity ×1.20	+$10K

Total estimate $60K

👥 Estimated audience size

69K

Lifetime downloads (US-equivalent)

Monthly active

12K

Daily active

3.7K

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

📲 Education engagement	~85 installs / rating
🔁 Education D30 retention	18%
📍 DAU / MAU stickiness	0.30

DAU / MAU 30% sticky

🔬

How we forecast this revenue

MEDIUM CONFIDENCE

Baseline

$6.9K/mo · ML-estimated from 234 triggers

Growth rate

+6.0% MoM · INDIE tier baseline (compound monthly)

6 months

$5.8K – $13.6K

12 months

$6.0K – $21.6K

24 months

$5.5K – $49.9K

Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.

📊

BU Investment Matrix

Early-stage solo · 43/100INDIE TIERexpected for tier

Revenue Strength

3.8

Product Quality

6.8

Market Position

0.3

Growth Velocity

5.0

Defensibility

4.1

Operational Safety

10.0

Founder Strength

3.7

Monetization Maturity

1.0

💰 Revenue: Modest — $2K - $15K/mo · INDIE tier · medium confidence, trajectory unclear.
⭐ Quality: 4.88★ across 823 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 = $123K-$219K.

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 5 of 5 triggers

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

Paid app ($0.00)METRIC		+$2,800
Excellent rating (4.9★)METRIC		+$2,200
Mature app (8y old)METRIC		+$1,500
Localized (6 languages)METRIC		+$600
Early-stage install base (823 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.

🆕 What's New · v7.2.0

More Languages Now Supported!
Our global community is growing. Building on our recent addition of Spanish and Portuguese, we are thrilled to announce that Littmann Learning is now fully available in German, Italian, and French.… Full release notes →

Profile & Insights

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

Identification

App name: Littmann™ Learning
Developer: CSD Labs
Bundle ID: Not found
App Store URL: Open in App Store
Category: Education
Content rating: 17+
Languages: EN, FR, DE, IT, PT, ES

Company

Website: Not found
Tagline: Today
Description: Find apps and games for iPhone, iPad, Mac, and more on the App Store.
Founded: Not found
HQ / Address: Not found
Employees: Not found
Logo: Available

Revenue

Verified revenue / mo: Not found
AI revenue estimate / mo: Not found
AI annual estimate: Not found
ML model estimate / mo: $459/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 growth823 ratings+82200% lifetimeShow 3-year history estimate ▾

Tracked (16 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value

🌍Geographic ReachNot ranked

This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.

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

Littmann® Learning, powered by eMurmur®, is a mobile app for cardiac and pulmonary auscultation education. Built for students, educators, and clinicians, it gives you access to real patient heart sounds, lung sounds, and guided learning modules – available anytime, anywhere.

Train your ear and strengthen your stethoscope skills with a rich library of high-fidelity recordings and interactive lessons designed to improve stethoscope auscultation and clinical listening confidence.… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

💾 19 MB🔞 17+📱 iOS 15.6+🔖 v7.2.0🔄 updated 0d ago🌐 EN, FR, DE, IT, PT +1📂 Education💰 Paid

📅

What Worked™ · Development Pipeline

8 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 →

2026-05

🔄

Monetization changed: paid → free

2026-03

⭐

Rating ↑ 3.57 → 4.88 (improved 1.31★)

2026-03

📈

Crossed 10 ratings — social-proof flywheel kicking in

2023-05

⭐

Rating ↓ 3.80 → 3.33 (dropped 0.47★)

2022-04

⭐

Rating ↑ 3.00 → 3.50 (improved 0.50★)

2020-11

⭐

Rating ↓ 4.00 → 3.00 (dropped 1.00★)

2020-07

⭐

Rating ↓ 5.00 → 4.00 (dropped 1.00★)

2018-01

🚀

First tracked snapshot — initial data captured

🔔

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📝 Description

BU Score · Transcendent

Full revenue analysis

Read the article-style breakdown for Littmann™ Learning: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.

Read deep-dive →