64
DroiDrum - a basic drum set
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.
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
📊 Performance Tracking LIVE
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.
| 🧱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 |
| ⚙15.3y maintenance × ~1-person team | +$91K |
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.
| 📲Music & Audio engagement | ~130 installs / rating |
| 📅15.3y of rating accumulation | -30% |
| 🔁Music & Audio D30 retention | 20% |
| 📍DAU / MAU stickiness | 0.50 |
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.
| 🏷Category context | Music & Audio |
| 📦Compact Android bundle | → Native Kotlin |
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.
| 📅8y+ since last update | Likely abandoned |
| •15y old + 1y+ no update | +5% (API deprecation drift) |
How we forecast this revenue
LOW CONFIDENCEBU Investment Matrix
Early-stage solo · 42/100INDIE TIERexpected for tier- 💰 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 3254d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3254d since update).
💰 Forecast Revenue / mo
MODEL| Excellent rating (5.0★)METRIC | +$2,200 | |
| Mature app (15y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (511 ratings)METRIC | +$400 |
📈 Reviews Growth
LIVE⭐ Rating Trend
LIVE📝 About this app
[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 →
Track this app’s revenue
FREEProfile & Insights
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
- $250/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- Not found
