59
Quality Score
Solid
Proposed by a Demon Lord
✍️ bumetric analysis
“
Proposed by a Demon Lord is an Android app from Day7 in the Simulation category, currently rated 4.4★ across 100 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 59: Solid (established niche player). For a Simulation 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.
💰 Revenue · today and ahead
Today
$5.0K/mo
In 12 months
$5.2K – $10.8K
In 24 months
$6.4K – $19.2K
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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD💰 Estimated build cost
$225K
↳ What it cost to build · not monthly revenue
Likely range $170K – $305K
$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 |
| ⚙Simulation complexity ×2.00 | +$59K |
| 🌐Cross-platform reach (iOS + Android) | +$65K |
| ⚙7.1y maintenance × ~1-person team | +$42K |
Total estimate$225K
ONE-TIME · EXIT VALUE💵 Estimated acquisition value
$100K
↳ What it would sell for · not monthly revenue
Marketplace range $75K – $125K · 30× MRR multiple
💸~0.4× 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 |
| 📅7.1y proven track record | +20% |
| ⭐★ rating ≥ 4.4 (solid) | +8% |
| 🏷Simulation category multiple | -10% |
| ⭐Small user base (<1K ratings) | -8% |
Final multiple30× MRR
👥 Estimated audience size
9.8K
Lifetime downloads (US-equivalent)
Monthly active
1.0K
Daily active
300
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
| 📲Simulation engagement | ~140 installs / rating |
| 📅7.1y of rating accumulation | -30% |
| 🔁Simulation D30 retention | 15% |
| 📍DAU / MAU stickiness | 0.30 |
DAU / MAU30% sticky
🛠 Estimated tech stack
🤖
Native Android (Kotlin)
Medium confidence · 55%
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 | Simulation |
| 📦Tiny game bundle | → Native 2D engine |
💀 Maintenance status
At risk
60%
Last shipped 2025-10-28 · 207 days ago
0 · Active50 · At risk100 · 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
| 📅6 months since last update | Concerning gap |
| 👥Small user base (100 ratings) + 7.1y old | +10% (solo-project pattern) |
VerdictAt risk
🔬
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
Building · 55/100MID TIERcompetitive build-outGrowth Velocity
5.0
Founder Strength
6.9
Product Quality
6.2
Revenue Strength
3.7
Monetization Maturity
4.0
Defensibility
9.3
Market Position
0.0
Operational Safety
9.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.4★ across 100 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 203d ago — slow cadence.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 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 = $90K-$160K. Portfolio play ($27K/mo combined) commands premium.
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:
| Paid app ($2.99)METRIC | +$2,800 | |
| Good rating (4.4★)METRIC | +$800 | |
| Established app (7y old)METRIC | +$800 | |
| Pre-traction phase (100 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.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v2.3🔄 updated 6mo ago📂 Simulation💰 Free💎 IAP $0.99 - $169.99 per item🚀 Launched 2019 (7y old)
📝 About this app
And... wait a minute!!!!
Are you telling me that....
I have to marry a Demon Lord?!!?!
★ 8 Demon Lords ★
A total tsundere lord. 「Penn」
A kind guy next door type. 「Hael」
Don't tell me he's even too lazy to breathe! 「Laika」
A mysterious kiddo. 「Riley」
Kind but a total playboy. 「Vernius」
A cheerful and puppy-like lord. 「Ren」
A cute, girl-phobic Demon Lord. 「Cornell」
A sharp workaholic. 「Isaac」
Do I really have to
marry these Demon Lords?
How did I end up in this strange world?!
A story where you 'just happened' to
marry a Demon Lord.… View full description on the official store →
Are you telling me that....
I have to marry a Demon Lord?!!?!
★ 8 Demon Lords ★
A total tsundere lord. 「Penn」
A kind guy next door type. 「Hael」
Don't tell me he's even too lazy to breathe! 「Laika」
A mysterious kiddo. 「Riley」
Kind but a total playboy. 「Vernius」
A cheerful and puppy-like lord. 「Ren」
A cute, girl-phobic Demon Lord. 「Cornell」
A sharp workaholic. 「Isaac」
Do I really have to
marry these Demon Lords?
How did I end up in this strange world?!
A story where you 'just happened' to
marry a Demon Lord.… View full description on the official store →
🧪
Tech & Domain Intel — day7games.com
- Tech stack
- Microsoft 365
Derived from public RDAP + DNS TXT records (no scraping, no login).
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Proposed by a Demon Lord
- Developer
- Day7
- Bundle ID
- com.newday.satanbride.p
- App Store URL
- Open in App Store
- Category
- Simulation
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- day7games.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
- $3.1K/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $0.99 - $169.99 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 growth100 ratings+69% 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.
More by Day7
View all →📦 Portfolio summaryINDIE studio
29apps·$27K/mocombined
✓ Diversified — top app contributes 11%; risk spread across portfolio
Full revenue analysis
Read the article-style breakdown for Proposed by a Demon Lord: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Proposed by a Demon Lord make per month?▾
Based on our ML-calibrated revenue forecast, Proposed by a Demon Lord earns approximately $3K/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 Proposed by a Demon Lord profitable?▾
With estimated build cost $225K and monthly revenue $3K, Proposed by a Demon Lord 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.
How many users does Proposed by a Demon Lord have?▾
Estimated audience: ~9K lifetime downloads, ~1K monthly active users, and ~300 daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.
What apps are like Proposed by a Demon Lord?▾
Browse the full Simulation 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 Proposed by a Demon Lord built with?▾
Our heuristic places Proposed by a Demon Lord on the Native Android (Kotlin) stack (Medium confidence, 55%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is Proposed by a Demon Lord still actively maintained?▾
Maintenance status: At risk (60% abandonment risk). Last shipped version was 6 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Proposed by a Demon Lord sell for?▾
Estimated acquisition value: $100K (marketplace range $75K – $125K). Calculated as 30× 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 Proposed by a Demon Lord last updated?▾
Proposed by a Demon Lord last shipped a new version on 2025-10-28 — 6 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Proposed by a Demon Lord?▾
Proposed by a Demon Lord is published by Day7 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 Proposed by a Demon Lord's BU Score?▾
Proposed by a Demon Lord 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.