D20 Complete Reference
59
Quality Score
Solid
✍️ bumetric analysis
“
D20 Complete Reference is an Android app from van Stein en Groentjes in the Books & Reference category, currently rated 4.1★ across 3,181 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 59: Solid (established niche player). For a Books & Reference 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
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
per month
MID 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
$90K
↳ What it cost to build · not monthly revenue
Likely range $70K – $120K
$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 |
| 💎 In-app purchase plumbing | +$9K |
| ⚙ Books & Reference complexity ×0.95 | $-2975 |
| 🌐 Cross-platform reach (iOS + Android) | +$31K |
Total estimate
$90K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$25K
↳ What it would sell for · not monthly revenue
Marketplace range $15K – $30K · 27× MRR multiple
💸
~0.3× build cost (under-water)
Synthetic estimate. Multiple band derived from iap / freemium model + 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
| 💎 IAP / freemium model base | 28× MRR |
| 🏷 Books & Reference category multiple | -2% |
Final multiple
27× MRR
👥 Estimated audience size
345K
Lifetime downloads (US-equivalent)
Monthly active
34K
Daily active
6.9K
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
| 📲 Books & Reference engagement | ~110 installs / rating |
| 🔁 Books & Reference D30 retention | 10% |
| 📍 DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 55/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
5.7
Product Quality
7.4
Revenue Strength
3.7
Monetization Maturity
5.0
Defensibility
10.0
Market Position
0.0
Operational Safety
7.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.12★ across 3,181 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 541d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (541d since update).
🎯 For competitors: Strong subscription moat. Hard to outcompete on retention. Better angle: free alternative with one-time purchase, or feature parity for an underserved sub-niche.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K.
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 appREVIEW | +$1,500 | |
| Low install base (3,181 ratings)METRIC | +$1,500 | |
| Mature app (12y old)METRIC | +$1,500 | |
| Good rating (4.1★)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 |
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
- D20 Complete Reference
- Developer
- van Stein en Groentjes
- Bundle ID
- com.vansteinengroentjes.apps.ddcompletereference
- App Store URL
- Open in App Store
- Category
- Books & Reference
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- www.s-g.nu
- 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
- $201/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $1.96 - $2.49 per item
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 growth3,181 ratings+41% 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
While you explore dungeons, loot treasure and kill dragons, the D20 Complete Reference app is your best companion!
This app is your guide while playing your favorite pen and paper RPG, for both players and Dungeon Masters.
*NOTE: While this app is mainly meant to be used with D20 system pen and paper role playing games (such as DnD 3 and 3.5) Most items, monsters and spells can also be used for the new 5E version, there is also a 5e version of the app available called "Complete Reference for DnD 5".
All your spells, items and monsters at hand without Internet or heavy books!… View full description on the official store →
This app is your guide while playing your favorite pen and paper RPG, for both players and Dungeon Masters.
*NOTE: While this app is mainly meant to be used with D20 system pen and paper role playing games (such as DnD 3 and 3.5) Most items, monsters and spells can also be used for the new 5E version, there is also a 5e version of the app available called "Complete Reference for DnD 5".
All your spells, items and monsters at hand without Internet or heavy books!… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 vVaries with device🔄 updated 0d ago📂 Books & Reference💰 Free📺 Ad-supported💎 IAP $1.96 - $2.49 per item
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for D20 Complete Reference: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by van Stein en Groentjes
View all →📦 Portfolio summaryINDIE studio
21apps·$1K/mocombined
✓ Diversified — top app contributes 13%; risk spread across portfolio
About this analysis
Why medium confidence: 3,181 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does D20 Complete Reference make per month?▴
Based on our ML-calibrated revenue forecast, D20 Complete Reference earns approximately $831/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 D20 Complete Reference?▴
Browse the full Books & Reference 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 D20 Complete Reference?▴
D20 Complete Reference is published by van Stein en Groentjes 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 D20 Complete Reference's BU Score?▴
D20 Complete Reference has a BU Score of 59/100 (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.