Calc-12E
56
Quality Score
Solid
Calc-12E
Low confidence
✍️ bumetric analysis
“
Calc-12E is an iOS app from Stone Meadow Development LLC in the Business category, currently rated 4.0★ across 20 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 56: Solid (established niche player). For a Business 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
$1.8K
per month
→
12-mo forecast
$1.5K – $5.6K
per month
→
24-mo forecast
$1.4K – $12.9K
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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$75K
↳ What it cost to build · not monthly revenue
Likely range $55K – $100K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~6 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 |
| ⚙ Business complexity ×1.50 | +$25K |
Total estimate
$75K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$150K
↳ What it would sell for · not monthly revenue
Marketplace range $125K – $200K · 14× MRR multiple
💸
~2.0× 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 3.5-4.0 (mixed) | -8% |
| 🏷 Business category multiple | +10% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
14× MRR
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$1.8K/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
$1.5K – $3.5K
12 months
$1.5K – $5.6K
24 months
$1.4K – $12.9K
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 · 39/100INDIE TIERlimited signalRevenue Strength
3.2
Product Quality
3.2
Market Position
2.0
Growth Velocity
5.0
Defensibility
4.5
Operational Safety
7.0
Founder Strength
5.1
Monetization Maturity
1.0
- 💰 Revenue: Modest — $705 - $4410/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 3.95★ across 20 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 2975d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (2975d since update).
🎯 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 = $31K-$56K. Portfolio play ($11K/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 6 of 6 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 | |
| 5 starREVIEW | +$1,800 | |
| Mature app (17y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| Pre-traction phase (20 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.
🆕 What's New · v4.2.3
This update from Apple will improve the functionality of this app. No new features are included.
Bug fix: The keyboard isn't squished anymore when launching in landscape on an iPad
Bug fix: The keyboard isn't squished anymore when launching in landscape on an iPad
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Calc-12E
- Developer
- Stone Meadow Development LLC
- Bundle ID
- com.stonemeadowdevelopment.Calc12E
- App Store URL
- Open in App Store
- Category
- Business
- Content rating
- 4+
- Languages
- EN, DE, PT, ES
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
- $11.6K/mo
- Top-grossing rank
- Outside top 100 in US Business
- 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.
✨AI Revenue EstimateCONFIDENCE: LOW
Publicly available data on the current monthly or annual revenue of the iOS app 'Calc-12E' by Stone Meadow Development LLC is not available. While the app has been on the App Store since early 2008 and the developer claims 'tens of thousands of long term customers', specific revenue figures from sources like Sensor Tower or Statista could not be found.
Sources mentioned: Sensor Tower, Statista, App Store
⭐Recent App Store Reviews40 latest · avg 4.08★ · 60.0% 5★ · 12.5% 1★
5★24 (60%)
4★6 (15%)
3★4 (10%)
2★1 (2%)
1★5 (12%)
+0 ratings/week
Praise: great ×17 love ×5 best ×5 perfect ×4 fantastic ×3
Top positive
★★★★★ soooo easy....
.....if you are familiar with the HP 12C.…
★★★★★ Finally!
This is the financial calculator that I have been waiting for. As I watched the HP 12C emulators enter the App Store, I kept wondering why none of them took advantage of the iPhone's power and interface. The HP 12C is my favorite calc…
Top negative
★☆☆☆☆ iPad - please move calculator back to the center
Latest update places calculator in lower left hand corner of iPad; not in the center like it's pictured in the app ad. Please move it back to center of screen.…
★☆☆☆☆ Where did my calculator go?
This was one of the first Apps I bought for my iPhone. It was the HP-12C, original classic and although the iPad upgrade wasn't very exciting it worked. The latest update coverts it to a 12E? What is that? I tried switching it back to …
📈Ratings growth20 ratings+1900% lifetimeShow 3-year history estimate ▾
Tracked (40 weeks) Pre-tracking estimate (37 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 → $1.99 (+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
5 Stars. “I can't tell you how often I use it, probably about as much as the phone app!"
- CharlieW, President. Waterman & Company (Real Estate Investment and Development)
“This is the first 12C type calculator for the itouch that has actually made me put down my real 12C. One of the best features of this calculator is the register display where you can see what is in FV, I, PV, PMT, etc. That alone makes it worth the $14.95 price. Consider the many other features that it has over and above the real 12C and you have one sweet program here. Best of the 12C emulators out there - hands down! “… View full description on the official store →
- CharlieW, President. Waterman & Company (Real Estate Investment and Development)
“This is the first 12C type calculator for the itouch that has actually made me put down my real 12C. One of the best features of this calculator is the register display where you can see what is in FV, I, PV, PMT, etc. That alone makes it worth the $14.95 price. Consider the many other features that it has over and above the real 12C and you have one sweet program here. Best of the 12C emulators out there - hands down! “… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 20 MB🔞 4+📱 iOS 8.0+🔖 v4.2.3🔄 updated 0d ago🌐 EN, DE, PT, ES📂 Business💰 Paid
📅
What Worked™ · Development Pipeline
8 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
⭐
Rating ↑ 3.60 → 3.95 (improved 0.35★)
2026-05
💲
Went paid — introduced $1.99 price point
2026-03
⭐
Rating ↓ 4.10 → 3.60 (dropped 0.50★)
2009-02
⭐
Rating ↓ 4.44 → 4.10 (dropped 0.34★)
2009-02
📈
Crossed 10 ratings — social-proof flywheel kicking in
2008-11
⭐
Rating ↓ 4.80 → 4.17 (dropped 0.63★)
2008-11
⭐
Rating ↓ 5.00 → 4.67 (dropped 0.33★)
2008-10
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 7 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 3.95★ | 20 | 3.95★ this version |
| 🇬🇧 GB | 4★ | 4 | 4★ this version |
| 🇩🇪 DE | 3.6★ | 5 | 3.6★ this version |
| 🇨🇦 CA | 5★ | 2 | 5★ this version |
| 🇦🇺 AU | 4.5★ | 4 | 4.5★ this version |
| 🇧🇷 BR | 3★ | 2 | 3★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
🔔
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📝 Description
95
BU Score · Transcendent
Similar apps in Business
About this analysis
Why low confidence: only 20 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
Calc-12E is a small / niche iOS app in the business space with weak public traction — only 20 ratings, no founder-verified MRR, and not ranked in any monitored grossing chart. The app appears to be monetised, but public signals are too sparse for a precise revenue estimate.
Bottom line: treat all revenue, audience and acquisition-value numbers on this page as directional only — not founder-verified facts.
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Calc-12E make per month?▴
Our model estimates Calc-12E earns roughly $11K/mo, but with only 20 ratings the confidence interval is wide. No founder-verified MRR is available for this app, so this is a model output calibrated against comparable apps in the same category. See methodology for the formula.
What apps are like Calc-12E?▴
Browse the full Business 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 Calc-12E?▴
Calc-12E is published by Stone Meadow Development LLC 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 Calc-12E's BU Score?▴
Calc-12E has a BU Score of 56/100 (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.