Roll Book
19
Quality Score
Niche
✍️ GetAppValue analysis
“
Roll Book is an Android app from OBN-soft in the Tools category, currently rated 1.0★ across 78 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 19: Niche (micro-niche or pre-traction stage). For a Tools app, that means micro-niche or pre-traction stage. 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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$70K
↳ What it cost to build · not monthly revenue
Likely range $50K – $95K
$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 |
| ⚙ Tools complexity ×0.90 | $-5049 |
| 🌐 Cross-platform reach (iOS + Android) | +$24K |
Total estimate
$70K
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$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 · 34/100INDIE TIERlimited signalRevenue Strength
2.7
Product Quality
0.8
Market Position
0.0
Growth Velocity
5.0
Defensibility
7.5
Operational Safety
5.0
Founder Strength
4.8
Monetization Maturity
1.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 1.0★ across 78 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 3803d ago — possibly dormant.
- ⚠️ Risk: Elevated — dormant (3803d since update).
🎯 For competitors: Vulnerable. Quality drift + slow updates create a clear opening for a fresh competitor with active dev cadence.
💵 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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Below-average rating (1.0★)METRIC | −$1,500 | |
| Mature app (14y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Pre-traction phase (78 ratings)METRIC | −$300 |
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
- Roll Book
- Developer
- OBN-soft
- Bundle ID
- com.obnsoft.kuroino
- App Store URL
- Open in App Store
- Category
- Tools
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- d.hatena.ne.jp
- 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
- 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.
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 a simple roll book application.
You can toggle the mark of cell in the sheet by tapping.
'P' as presence,
'A' as absence,
'L' as late arrival,
'E' as early departure.
(Of course you can customize these characters.)
In addition, you can export data as csv-file and you can import data from csv-file.
You can toggle the mark of cell in the sheet by tapping.
'P' as presence,
'A' as absence,
'L' as late arrival,
'E' as early departure.
(Of course you can customize these characters.)
In addition, you can export data as csv-file and you can import data from csv-file.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v0.0.2🔄 updated 0d ago📂 Tools💰 Free
🔔
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📝 Description
95
BU Score · Transcendent
More by OBN-soft
View all →📦 Portfolio summaryINDIE studio
7apps·$200/mocombined
✓ Diversified — top app contributes 29%; risk spread across portfolio
About this analysis
Why low confidence: only 78 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Roll Book make per month?▴
Based on our ML-calibrated revenue forecast, Roll Book earns approximately $229/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 Roll Book?▴
Browse the full Tools 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 Roll Book?▴
Roll Book is published by OBN-soft 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 Roll Book's BU Score?▴
Roll Book has a BU Score of 19/100 (Niche). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.