74
BU Score
Strong
12Calc
✍️ BU Analytics Review
“
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.
Our BU Score puts it at 74 — Strong (healthy traction). For a Finance app, that means healthy traction.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
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.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jan 25
Mar 25
Apr 25
May 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 6 MB🔞 4+📱 iOS 17.6+🔖 v3.0🔄 updated 8mo ago🌐 EN📂 Finance💰 Paid🚀 Launched 2013 (12y old)
📝 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. You can review, mail, text, share or print the tape.
•Unit Converter: Convert between a wide variety of common units and currencies. Currency rates can be downloaded from the internet.
•Work Sheets with interactive graphs:
Auto Purchase
Black-Scholes
Bond
Break-even
Cash Flow analysis
Currency
Date
Depreciation
Interest Conversion
Lease
Loan Amortization (includes option for Canadian mortgages)
Margin&Markup
Refinance
Statistics
Tip
TVM
•Views for all orientations: Portrait and landscape renderings of the full keyboard are provided for iPhone and iPad. The iPad version includes slide over and multiple split view displays as well as side-by-side display of the help page, audit tape, tvm mortgage table or program variables.
•Built-in contextual help: Touch the ? key for a description of any keyboard function with examples of use. If you are just learning or can't remember how to use a function- just touch the ? key. Includes tutorials on how to use reverse Polish notation (RPN) and how to solve time value of money problems.
•HD Graphics: Graphics optimized for both retina and standard resolution screens. Choose from multiple color schemes including gold, rose gold, brass, copper, silver and several color tints.
•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. You can review, mail, text, share or print the tape.
•Unit Converter: Convert between a wide variety of common units and currencies. Currency rates can be downloaded from the internet.
•Work Sheets with interactive graphs:
Auto Purchase
Black-Scholes
Bond
Break-even
Cash Flow analysis
Currency
Date
Depreciation
Interest Conversion
Lease
Loan Amortization (includes option for Canadian mortgages)
Margin&Markup
Refinance
Statistics
Tip
TVM
•Views for all orientations: Portrait and landscape renderings of the full keyboard are provided for iPhone and iPad. The iPad version includes slide over and multiple split view displays as well as side-by-side display of the help page, audit tape, tvm mortgage table or program variables.
•Built-in contextual help: Touch the ? key for a description of any keyboard function with examples of use. If you are just learning or can't remember how to use a function- just touch the ? key. Includes tutorials on how to use reverse Polish notation (RPN) and how to solve time value of money problems.
•HD Graphics: Graphics optimized for both retina and standard resolution screens. Choose from multiple color schemes including gold, rose gold, brass, copper, silver and several color tints.
🆕 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
- www.acornaircraft.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
- $37.6K/mo
- Top-grossing rank
- Outside top 100 in US Finance
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- http://www.acornaircraft.com/contact-us.html
- About page
- Not found
📈Ratings growth901 ratings+8% lifetimeShow 3-year history estimate ▾
Tracked (51 weeks) Pre-tracking estimate (35 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.
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 Finance
Venmo
★ 4.8 · 15,465,192 reviews
Capital One Mobile
★ 4.8 · 10,599,460 reviews
Wells Fargo Mobile®
★ 4.9 · 10,452,703 reviews
Chase Mobile®: Bank & Invest
★ 4.8 · 8,864,586 reviews
Cash App
★ 4.8 · 8,183,076 reviews
Intuit Credit Karma
★ 4.8 · 7,601,753 reviews
PayPal: Geld senden, verwalten
★ 4.8 · 6,299,713 reviews
Discover Mobile
★ 4.9 · 5,071,544 reviews
Browse BU Analytics
📚 All 55,000+ Books
🜍 Alchemy & Hermeticism
🔮 Magic & Ritual
🌙 Witchcraft & Paganism
⭐ Astrology & Cosmology
🃏 Divination & Tarot
📜 Finance
✡️ Kabbalah & Jewish Mysticism
🕉️ Mysticism & Contemplation
🕊️ Theosophy & Anthroposophy
🏛️ Freemasonry & Secret Societies
👻 Spiritualism & Afterlife
📖 Sacred Texts & Gnosticism
👁️ Supernatural & Occult Fiction
🧘 Spiritual Development
📚 Esoteric History & Biography
Info
About BU Analytics