12Calc
74
Quality Score
Strong
12Calc
Medium confidence
✍️ bumetric analysis
“
12Calc is an iOS app from Ernest Brock in the Finance category, currently rated 4.9★ across 901 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 74: Strong (healthy traction). For a Finance app, that means healthy traction. 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
$6.0K
per month
→
12-mo forecast
$6.2K – $12.9K
per month
→
24-mo forecast
$7.6K – $22.9K
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
$80K
↳ What it cost to build · not monthly revenue
Likely range $60K – $110K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2 months at current MRR
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 |
| ⚙ Finance complexity ×1.60 | +$30K |
Total estimate
$80K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$700K
↳ What it would sell for · not monthly revenue
Marketplace range $500K – $900K · 18× MRR multiple
💸
~8.8× return on build cost
Synthetic estimate. Multiple band derived from ad-supported + 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
| 📺 Ad-supported base | 15× MRR |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Finance category multiple | +15% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
18× MRR
👥 Estimated audience size
54K
Lifetime downloads (US-equivalent)
Monthly active
15K
Daily active
6.0K
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
| 📲 Finance engagement | ~60 installs / rating |
| 🔁 Finance D30 retention | 28% |
| 📍 DAU / MAU stickiness | 0.40 |
DAU / MAU
40% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$6.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$5.7K – $9.4K
12 months
$6.2K – $12.9K
24 months
$7.6K – $22.9K
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 · 50/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
6.6
Product Quality
6.8
Revenue Strength
3.8
Monetization Maturity
1.0
Defensibility
6.0
Market Position
2.0
Operational Safety
9.0
- 💰 Revenue: Modest — $4K - $8K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.89★ across 901 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 279d 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 = $107K-$190K. Portfolio play ($88K/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 11 of 11 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| great valueREVIEW | +$1,600 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (12y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Early-stage install base (901 ratings)METRIC | +$400 | |
| Single-language (English only)METRIC | −$400 |
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.
🆕 What's New · v3.0
•Fixed currency download
•Fixed register save / restore
•Fixed register save / restore
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- 12Calc
- Developer
- Ernest Brock
- Bundle ID
- com.ErnestBrock.12Calc
- App Store URL
- Open in App Store
- Category
- Finance
- Content rating
- 4+
- Languages
- EN
Company
- Website
- Not found
- 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
- $37.6K/mo
- Top-grossing rank
- Outside top 100 in US Finance
- 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.
📈Ratings growth901 ratings+10% lifetimeShow 3-year history estimate ▾
Tracked (51 weeks) Pre-tracking estimate (34 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
💰Pricing History$0.00 → $8.99 (+0%)
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
12Calc is a full version of the well known HP12C for the iPhone and iPad. It also includes an audit tape, unit converter, worksheets, rotated views, user guide and HD graphics optimized for iPad and iPhone retina displays.
•Runs in 64 bit mode on the latest iOS release and new iPads and iPhones.
•Calculations are highly accurate and blazing fast. No more "running" flashing displays for amortizations, depreciation schedules or interest calculations. Work as fast as you can type.
•Audit Tape: The audit tape keeps a record of your calculations.… View full description on the official store →
•Runs in 64 bit mode on the latest iOS release and new iPads and iPhones.
•Calculations are highly accurate and blazing fast. No more "running" flashing displays for amortizations, depreciation schedules or interest calculations. Work as fast as you can type.
•Audit Tape: The audit tape keeps a record of your calculations.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 6 MB🔞 4+📱 iOS 17.6+🔖 v3.0🔄 updated 0d ago🌐 EN📂 Finance💰 Paid
📅
What Worked™ · Development Pipeline
6 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
💲
Went paid — introduced $8.99 price point
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2022-11
📈
Crossed 100 ratings — social-proof flywheel kicking in
2021-02
📈
Crossed 50 ratings — social-proof flywheel kicking in
2017-10
📈
Crossed 10 ratings — social-proof flywheel kicking in
2015-11
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 7 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.8★ | 5 | 4.8★ this version |
| 🇧🇷 BR | 4.77011★ | 87 | 4.77011★ this version |
| 🇨🇦 CA | 5★ | 25 | 5★ this version |
| 🇬🇧 GB | 4.8★ | 20 | 4.8★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
| 🇯🇵 JP | 5★ | 4 | 5★ this version |
| 🇺🇸 US | 4.8948★ | 903 | 4.8948★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for 12Calc: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Ernest Brock
View all →📦 Portfolio summaryINDIE studio
4apps·$88K/mocombined
✓ Diversified — top app contributes 43%; risk spread across portfolio
About this analysis
Why medium confidence: 901 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does 12Calc make per month?▴
Based on our ML-calibrated revenue forecast, 12Calc earns approximately $37K/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 12Calc?▴
Browse the full Finance 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 12Calc?▴
12Calc is published by Ernest Brock on the Apple App 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 12Calc's BU Score?▴
12Calc has a BU Score of 74/100 (Strong). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.