68
Quality Score
Solid
Thirty One | 31 Card Game
High confidence
✍️ bumetric analysis
“
Thirty One | 31 Card Game is an Android app from DonkeyCat Games in the Card category, currently rated 4.6★ across 17,837 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Quality Score is 68: Solid (established niche player). For a Card 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
$700K
per month
→
12-mo forecast
$741K – $1141K
per month
→
24-mo forecast
$886K – $1645K
per month
BIG 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
$185K
↳ What it cost to build · not monthly revenue
Likely range $140K – $250K
$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 |
| ⚙Card complexity ×1.50 | +$29K |
| 🌐Cross-platform reach (iOS + Android) | +$49K |
| ⚙7.9y maintenance × ~1-person team | +$47K |
Total estimate$185K
ONE-TIME · EXIT VALUE💵 Estimated acquisition value
$30K
↳ What it would sell for · not monthly revenue
Marketplace range $20K – $35K · 31× MRR multiple
💸~0.2× 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 |
| 📅7.9y proven track record | +20% |
| ⭐★ rating ≥ 4.4 (solid) | +8% |
| 🏷Card category multiple | -15% |
Final multiple31× MRR
👥 Estimated audience size
1.9M
Lifetime downloads (US-equivalent)
Monthly active
140K
Daily active
42K
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
| 📲Card engagement | ~150 installs / rating |
| 📅7.9y of rating accumulation | -30% |
| 🔁Card D30 retention | 12% |
| 📍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 | Card |
| 📦Tiny game bundle | → Native 2D engine |
💀 Maintenance status
Active
5%
Last shipped 2026-05-21 · 4 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
| 📅4 days since last update | Active development |
VerdictActive
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$700K/mo · ML-estimated from 234 triggers
Growth rate
+2.5% MoM · BIG tier baseline (compound monthly)
6 months
$690K – $933K
12 months
$741K – $1.1M
24 months
$886K – $1.6M
Compound growth at +2.5% MoM (tier baseline for BIG). Range widens with horizon — typical noise band ±15% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Mixed signals · 64/100BIG TIERcompetitive but cautiousGrowth Velocity
5.0
Founder Strength
6.3
Product Quality
9.3
Revenue Strength
5.8
Monetization Maturity
5.0
Defensibility
9.5
Market Position
0.0
Operational Safety
10.0
- 💰 Revenue: Healthy — $280K - $1540K/mo · BIG tier · medium-low confidence, trajectory unclear.
- ⭐ Quality: 4.63★ across 17,837 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: dev shipping weekly.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 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 = $12.6M-$22.4M.
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:
| Mid install base (17,837 ratings)METRIC | +$5,500 | |
| Excellent rating (4.6★)METRIC | +$2,200 | |
| Established app (7y old)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.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 v4.10🔄 updated 4d ago📂 Card💰 Free📺 Ad-supported💎 IAP $0.99 - $49.99 per item🚀 Launched 2018 (7y old)
📝 About this app
🎉 Introducing <b>Thirty One</b>, one of the most popular 2 to 4-player online multiplayer card games 🌟 The 31 card game is perfect for adults, teens, or seniors! Very easy to learn, but never boring to play.
This 31 card game is also known as Schwimmen, Knack, Schnauz, Hosn Obe, Cadillac, Whammy, Juble, Blitz or Scat and is very similar to popular card games like Cribbage, Commerce or Blackjack. Around the world it goes by Trentuno or 31 Gioco di Carte (Italian), Eenendertigen or 31 Kaartspel (Dutch), Fajer (Hungarian), or Treinta y Uno / 31 Juego de Cartas (Spanish).… View full description on the official store →
This 31 card game is also known as Schwimmen, Knack, Schnauz, Hosn Obe, Cadillac, Whammy, Juble, Blitz or Scat and is very similar to popular card games like Cribbage, Commerce or Blackjack. Around the world it goes by Trentuno or 31 Gioco di Carte (Italian), Eenendertigen or 31 Kaartspel (Dutch), Fajer (Hungarian), or Treinta y Uno / 31 Juego de Cartas (Spanish).… View full description on the official store →
🧪
Tech & Domain Intel — donkeycat.com
- Mail provider
- Google Workspace
- Tech stack
- Google Workspace
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
- Thirty One | 31 Card Game
- Developer
- DonkeyCat Games
- Bundle ID
- com.donkeycat.hosnobeol
- App Store URL
- Open in App Store
- Category
- Card
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- www.donkeycat.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
- $895/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $0.99 - $49.99 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 growth17,837 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 DonkeyCat Games
View all →📦 Portfolio summaryINDIE studio
6apps·$5K/mocombined
✓ Diversified — top app contributes 40%; risk spread across portfolio
Full revenue analysis
Read the article-style breakdown for Thirty One | 31 Card Game: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why high confidence: 17,837 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Thirty One | 31 Card Game make per month?▴
Based on our ML-calibrated revenue forecast, Thirty One | 31 Card Game earns approximately $894/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 Thirty One | 31 Card Game profitable?▴
With estimated build cost $185K and monthly revenue $894, Thirty One | 31 Card Game 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 Thirty One | 31 Card Game have?▴
Estimated audience: ~1.9M lifetime downloads, ~140K monthly active users, and ~42K 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 Thirty One | 31 Card Game?▴
Browse the full Card 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 Thirty One | 31 Card Game built with?▴
Our heuristic places Thirty One | 31 Card Game 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 Thirty One | 31 Card Game still actively maintained?▴
Maintenance status: Active (5% abandonment risk). Last shipped version was 4 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Thirty One | 31 Card Game sell for?▴
Estimated acquisition value: $30K (marketplace range $20K – $35K). Calculated as 31× 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 Thirty One | 31 Card Game last updated?▴
Thirty One | 31 Card Game last shipped a new version on 2026-05-21 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Thirty One | 31 Card Game?▴
Thirty One | 31 Card Game is published by DonkeyCat Games 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 Thirty One | 31 Card Game's BU Score?▴
Thirty One | 31 Card Game has a BU Score of 68/100 (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.