DroiDrum - a basic drum set
64
Quality Score
Solid
✍️ bumetric analysis
“
DroiDrum - a basic drum set is an Android app from HIROMARU KOBO in the Music & Audio category, currently rated 5.0★ across 511 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 64: 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
$500
per month
→
12-mo forecast
$437 – $1575
per month
→
24-mo forecast
$405 – $3644
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
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
$115K
↳ What it cost to build · not monthly revenue
Likely range $85K – $155K
$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 |
Total estimate
$115K
👥 Estimated audience size
66K
Lifetime downloads (US-equivalent)
Monthly active
13K
Daily active
6.5K
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
| 📲 Music & Audio engagement | ~130 installs / rating |
| 🔁 Music & Audio D30 retention | 20% |
| 📍 DAU / MAU stickiness | 0.50 |
DAU / MAU
50% sticky
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
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
Early-stage solo · 41/100INDIE TIERexpected for tierGrowth Velocity
5.0
Founder Strength
4.4
Product Quality
7.0
Revenue Strength
2.7
Monetization Maturity
1.0
Defensibility
6.0
Market Position
0.0
Operational Safety
7.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 5.0★ across 511 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 3324d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3324d 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
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 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (5.0★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| Mature app (15y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (511 ratings)METRIC | +$400 |
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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- DroiDrum - a basic drum set
- Developer
- HIROMARU KOBO
- Bundle ID
- com.gmail.kobo.hiromaru
- App Store URL
- Open in App Store
- Category
- Music & Audio
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- hiromarukobo.firebaseapp.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
- $276/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 growth511 ratings+34% lifetimeShow 3-year history estimate ▾
Tracked (1 weeks) Pre-tracking estimate (37 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
This is the application for playing the drums.
[Key Features]
- Support for multi touch.
- Support for size and position change.
- Support for volume adjustment according to the hit position of drum.
- Support for playing with motion sensors.
- Support for playing drums by screen slide.
- Support for animation when playing drums.
- Support for adjustment L / R audio balance depending on the location of the drum.
※ Please enjoy drum playing at high sound quality by using the earphones.
Please use wired earphones, because the bluetooth earphone sound reproduction is delayed.… View full description on the official store →
[Key Features]
- Support for multi touch.
- Support for size and position change.
- Support for volume adjustment according to the hit position of drum.
- Support for playing with motion sensors.
- Support for playing drums by screen slide.
- Support for animation when playing drums.
- Support for adjustment L / R audio balance depending on the location of the drum.
※ Please enjoy drum playing at high sound quality by using the earphones.
Please use wired earphones, because the bluetooth earphone sound reproduction is delayed.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v0.9.4🔄 updated 0d ago📂 Music & Audio💰 Free📺 Ad-supported
🔔
Track this app’s revenue
FREEGet an email when revenue moves by your threshold. No spam, unsubscribe in one click.
📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for DroiDrum - a basic drum set: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by HIROMARU KOBO
View all →📦 Portfolio summaryINDIE studio
4apps·$551/mocombined
Lead-app heavy — top app contributes 50%
About this analysis
Why medium confidence: 511 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does DroiDrum - a basic drum set make per month?▴
Based on our ML-calibrated revenue forecast, DroiDrum - a basic drum set earns approximately $250/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 DroiDrum - a basic drum set?▴
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.
Who makes DroiDrum - a basic drum set?▴
DroiDrum - a basic drum set is published by HIROMARU KOBO 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 DroiDrum - a basic drum set's BU Score?▴
DroiDrum - a basic drum set has a BU Score of 64/100 (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.