How much does J42 Morse Code Trainer make per month?

Based on our ML-calibrated revenue forecast, J42 Morse Code Trainer earns approximately $144/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 J42 Morse Code Trainer?

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 J42 Morse Code Trainer?

J42 Morse Code Trainer is published by Java42 Mobile 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 J42 Morse Code Trainer's BU Score?

J42 Morse Code Trainer has a BU Score of 43/100 (Emerging). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.

J42 Morse Code Trainer

Quality Score

Emerging

J42 Morse Code Trainer

Name: J42 Morse Code Trainer — app revenue, audience, build cost & risk profile
Creator: bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: J42 Morse Code Trainer revenue, J42 Morse Code Trainer app analytics, mobile app revenue estimate, Education revenue, Android app revenue

by Java42 Mobile

Low confidence

3.5 ✍️ Editor

✍️ bumetric analysis

“

J42 Morse Code Trainer is an Android app from Java42 Mobile in the Education category, currently rated 3.5★ across 33 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Quality Score is 43: Emerging (early traction worth watching). For a Education app, that means early traction worth watching. 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

$500

per month

→

12-mo forecast

$437 – $1575

per month

→

24-mo forecast

$405 – $3644

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

$95K

↳ What it cost to build · not monthly revenue

Likely range $70K – $130K

$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
🌐 Cross-platform reach (iOS + Android)	+$33K

Total estimate $95K

🔬

How we forecast this revenue

LOW CONFIDENCE

Baseline

$500/mo · ML-estimated from 234 triggers

Growth rate

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

Direction

Headwinds: rating drift may slow acquisition

6 months

$426 – $993

12 months

$437 – $1.6K

24 months

$405 – $3.6K

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

Pre-traction · 35/100INDIE TIERlimited signal

Growth Velocity

5.0

Founder Strength

4.4

Product Quality

2.8

Revenue Strength

2.7

Monetization Maturity

1.0

Defensibility

5.1

Market Position

0.0

Operational Safety

7.0

💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
⭐ Quality: 3.5★ across 33 reviews — weak — significant quality concerns.
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: ⚠ last update 1280d ago — possibly dormant.
⚠️ Risk: Moderate — dormant (1280d since update).

🎯 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 = $9K-$16K.

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 3 of 3 triggers

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

Established app (6y old)METRIC		+$800
Ad-supported / freemiumMETRIC		+$600
Pre-traction phase (33 ratings)METRIC		−$300

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: J42 Morse Code Trainer
Developer: Java42 Mobile
Bundle ID: com.java42.tools.j42morsecodetrainer
App Store URL: Open in App Store
Category: Education
Content rating: Not found
Languages: Not found

Company

Website: Not found
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: $29/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 growth33 ratings+50% 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.

📝 About this app

Listen to CW words, letters or  groups at various speeds and formats.

Designed to make it easy to recognize Morse code characters at various speeds.

Improve existing CW skills for those who already know the code.

Code oscillator outputs tones from 5 to 39 words per minute.

Tone frequency is adjustable from 500 Hz to 2.9 kHz.

Choose from Over 100 programmed character sequences.

Optional alphanumeric cues.

Optional voice cues.

Loop mode plays the selected character sequence continuously.

Optionally disable the tone generator for visual training.… View full description on the official store →