How much does s.mart Fretboard Trainer Quiz make per month?

Based on our ML-calibrated revenue forecast, s.mart Fretboard Trainer Quiz earns approximately $2.0K/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 s.mart Fretboard Trainer Quiz profitable?

With estimated build cost $150K and monthly revenue $2.0K, s.mart Fretboard Trainer Quiz 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.

What apps are like s.mart Fretboard Trainer Quiz?

Browse the full Music & Audio 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 s.mart Fretboard Trainer Quiz built with?

Our heuristic places s.mart Fretboard Trainer Quiz 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 s.mart Fretboard Trainer Quiz still actively maintained?

Maintenance status: Likely abandoned (95% abandonment risk). Last shipped version was 2+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.

How much would s.mart Fretboard Trainer Quiz sell for?

Estimated acquisition value: $40K (marketplace range $30K – $50K). Calculated as 19× 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.

When was s.mart Fretboard Trainer Quiz last updated?

s.mart Fretboard Trainer Quiz last shipped a new version on 2024-07-16 — more than 2 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.

Who makes s.mart Fretboard Trainer Quiz?

s.mart Fretboard Trainer Quiz is published by s.mart Music Lab 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 s.mart Fretboard Trainer Quiz's BU Score?

s.mart Fretboard Trainer Quiz has a BU Score of 61/100 (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.

s.mart Fretboard Trainer Quiz

Quality Score

Solid

s.mart Fretboard Trainer Quiz

Name: s.mart Fretboard Trainer Quiz — app revenue, audience, build cost & risk profile
Creator: Bumetric
License: https://creativecommons.org/licenses/by/4.0/
Keywords: s.mart Fretboard Trainer Quiz revenue, s.mart Fretboard Trainer Quiz app analytics, mobile app revenue estimate, Music & Audio revenue, Android app revenue

by s.mart Music Lab

Low confidence

4.8 Google Play rating

✍️ Bumetric analysis

“

s.mart Fretboard Trainer Quiz is an Android app from s.mart Music Lab in the Music & Audio category, currently rated 4.8★ across 38 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Quality Score is 61: Solid (established niche player). For a Music & Audio 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

$2.0K

per month

→

12-mo forecast

$1.7K – $6.2K

per month

→

24-mo forecast

$1.6K – $14.4K

per month

INDIE 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

Run free AI audit →

Typical impact: +2-5× organic installs

📊 Performance Tracking LIVE

1 snapshots on record

idle

Rating

4.8

Reviews

38 reviews

Forecast Revenue / mo

$2.0K

Snapshots tracked

since Jun 2026

ONE-TIME · BUILD 💰 Estimated build cost

$150K

↳ What it cost to build · not monthly revenue

Likely range $110K – $200K

$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
⚙ Music & Audio complexity ×1.45	+$22K
🌐 Cross-platform reach (iOS + Android)	+$40K
⚙ 6.4y maintenance × ~1-person team	+$38K

Total estimate $150K

ONE-TIME · EXIT VALUE 💵 Estimated acquisition value

$40K

↳ What it would sell for · not monthly revenue

Marketplace range $30K – $50K · 19× MRR multiple

💸 ~0.3× build cost (under-water)

Synthetic estimate. Multiple band derived from ad-supported + 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

📺 Ad-supported base	15× MRR
📅 6.4y proven track record	+20%
⭐ ★ rating ≥ 4.7 (premium)	+15%
⭐ Small user base (<1K ratings)	-8%

Final multiple 19× MRR

🛠 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	Music & Audio
📦 Compact Android bundle	→ Native Kotlin

💀 Maintenance status

Likely abandoned

95%

Last shipped 2024-07-16 · 799 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

📅 2y+ since last update	Likely abandoned
👥 Small user base (38 ratings) + 6.4y old	+10% (solo-project pattern)

Verdict Likely abandoned

🔬

How we forecast this revenue

MEDIUM CONFIDENCE

Baseline

$2.0K/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

$1.7K – $3.9K

12 months

$1.7K – $6.2K

24 months

$1.6K – $14.4K

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 · 41/100INDIE TIERexpected for tier

Growth Velocity

5.0

Founder Strength

5.9

Product Quality

3.8

Revenue Strength

3.3

Monetization Maturity

1.0

Defensibility

6.6

Market Position

0.0

Operational Safety

7.0

💰 Revenue: Modest — $791 - $4945/mo · INDIE tier · medium confidence, trajectory unclear.
⭐ Quality: 4.8★ across 38 reviews — weak — significant quality concerns.
📍 Market: Not yet charting in any of the 9 monitored markets.
📈 Growth: ⚠ last update 797d ago — possibly dormant.
⚠️ Risk: Moderate — dormant (797d 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 = $35K-$63K.

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 ($4.49)METRIC		+$2,800
Excellent rating (4.8★)METRIC		+$2,200
5 starREVIEW		+$1,800
Established app (6y old)METRIC		+$800
Pre-traction phase (38 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: s.mart Fretboard Trainer Quiz
Developer: s.mart Music Lab
Bundle ID: de.smartchord.droid.plus.quiz.fretboard
App Store URL: Open in App Store
Category: Music & Audio
Content rating: Not found
Languages: Not found

Company

Website: www.smartchord.de
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: $2.0K/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

Learning the notes, chords and scales on the whole fretboard so well that you can quickly find them again while playing the guitar can be very tedious. Study these important things in a playful and nevertheless very effective way for every possible tuning and instrument like Guitar, Bass, Banjo or Ukulele. 

Different quiz types and a lot of options make it diversified and never boring. Statistics show your progress and the notes, chords and scales you have to focus on. Certainly one of the most extensive and versatile of its kind.

⭐ Supports about 40 instruments.… View full description on the official store →

App Specs

🔐 Own this app? Claim & verify MRR →

🔖 v1.5🔄 updated 2y ago📂 Music & Audio💰 Free🚀 Launched 2020 (6y old)

🔔