# MathU 12D Financial Calculator — Surpasses the classic HP-12C > RPN financial calculator emulating and improving upon the HP-12C. (iPhone/iPad app by Creative Creek, LLC.) - Source: https://appshunter.io/ios/app/mathu-12d-financial-calculator/id379327689 (this page in markdown: same URL + `.md`) - Developer: [Creative Creek, LLC](https://appshunter.io/developer/293653081) - Category: Finance, Utilities - Price: $4.99 (on sale, was $24.99) - Rating: 4.80/5 from 89 App Store ratings · 28 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 6 MB - Languages: American English - Released: 2010-07-13 - Data updated: 2026-08-27 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/mathu-12d-financial-calculator/id379327689/reviews.md ## What is MathU 12D Financial Calculator? "5 stars - This app is great. Very Quick. Would highly recommend". See more in customer reviews. MathU 12D, the Deluxe Financial RPN Calculator, is written from the ground up to behave exactly like and surpass the classic HP-12C. MathU 12D uses the same RPN (Reverse Polish Notation) entry system and supports the same mathematical functions as the HP-12C. In fact, if you are familiar with the HP-12C you will be able to use MathU 12D right away. Supports iPhone, iPad and macOS. First released in 2010, the calculator continues to be updated with new features as iOS improves. Made by Creative Creek, LLC. We have been making calculators for mobile devices for over 25 years. Also check out MathU RPN, our advanced scientific and financial RPN calculator. MathU 12D adds some big improvements over the original HP-12C: 1) Visible Financial Registers -- The values of the financial registers are displayed prominently above the associated buttons. This allows you to quickly verify that the loan parameters are correct and builds confidence in the results. 2) Computation Speed -- You will be amazed how quickly MathU 12D produces results. Even complicated calculations like the determination of interest rate, IRR or NPV are finished in a fraction of a second. 3) Two line display -- A two line display can be chosen so that the x and y register values are always visible. You can immediately see results and verify input values. 4) Visible Programming -- Program lines are displayed using the function name instead of the key pad location. This makes reading and writing MathU 12D programs easier. 5) 20 Registers unaffected by programs - The registers are not shared with the program space so you can create up to 99 line programs without sacrificing any storage space. Documentation for MathU 12D is available from within the app. All the functions work exactly the same as on the HP-12C, so if you are familiar with the HP-12C you will be able to use MathU 12D right away. Features - Fast and accurate computation based on IEEE double precision (up to 16 digits) - 5 financial registers (visible on the main screen) - 20 storage registers - Programmable with up to 99 program steps - Program steps show function name directly - Two line display - FIX, SCI, and ENG display modes - Access to on-line documentation - Settings screen - Thousands and decimal separators follow international format settings - Copy and paste support - Support for iOS 8.x or higher. - Support for iPhone and iPad Functions Supported: - Time value of money (N,i,PV,PMT,FV) - Net Present Value (NPV) - Internal Rate of Return (IRR) - Simple interest - Cash Flows (CF0, CFj, Nj) - Bond pricing and yield (PRICE, YTM) - Depreciation based on - Straight line (SL) - Sum-Of-the-Years-Digits (SOYD) - Declining balance (DB) - Date in future (DATE) or days between dates (DYS) - Statistics mean, std, wieghted mean, factorial - Percent, percent change and percent of total - Linear curve fitting (x,r y,r) - Scientific functions (y^x, e^x, sqrt, 1/x, ln) - Integer and fractional parts (INTG, FRAC) Requires iOS 16.6+ ## Key features - RPN entry system - Visible financial registers - Fast computation speed - Two-line display option - Visible programming - Programmable up to 99 steps - Time value of money functions ## Chart rankings - #30 in Top Paid · Finance (US App Store) ## Recent user reviews (10 of 28) All indexed reviews: https://appshunter.io/ios/app/mathu-12d-financial-calculator/id379327689/reviews.md ### 4/5 — Very good *2021-01-02* Like this app very much. Just like having a 12c ### 1/5 — Freezes phone *2019-04-19* App freezes the phone. I have an iPhone XR. **Developer response:** This problem was fixed in 2020. ### 5/5 — Not able to move off app - forces restart *2018-11-05* iPhone XR - app works , but once you start it , you are stuck on the app until you do a restart. Keeping 5 stars for now since the performance over the last 5 plus years has been perfect until now. **Developer response:** This problem was fixed in 2020. ### 5/5 — PERFECT HP 12 C !!! *2018-01-30* I too have been using a 12C since it first came on the market 35+ years ago - Yikes! - But wanting not to carry an actual 12C around I discovers this WONDERFUL App 4 years ago! Its always worked PERFECTLY! No need to buy the “competition” - this free app does the job!!!! Thanks!!! ### 5/5 — MathU 12D -Brilliant *2017-07-12* I have loved the HP RPN calculators, and bought an 11C when I graduated in 1983. However it didn't do date calcs. This version does. The calculator is great on an iPhone 4 and even better on iPhone 6. ### 5/5 — Better than the real thing! *2016-09-18* I have used the 12c since it was first sold by HP. I used its predecessor model, too. I use HP's virtual version on my laptop. This app is a seamless improvement on a classic design. Take this from a retired financier, this is the best financial calculator app! Update: Still using it with iOS 10. ### 5/5 — Must-have for finance people *2016-06-01* So great that they created this with some additional functionality. It disappeared from my iPhone after an iOS update, and I missed it almost as much as if I'd lost my phone entirely. ### 1/5 — Screen size update please!! *2015-08-28* My overall rating for the app is 5 stars, but my rating for the current version is 1! Please come out with an update to bring back full screen on the iPad. I would even pay again just to get the old version back! **Developer response:** This problem was fixed in 2020. Expand the size of the app with the 2X button. ### 4/5 — New version *2014-11-11* Screen too small on iPad !!!!!! In new version **Developer response:** The ability to zoom the app on the iPad was added in 2020. ### 1/5 — App works great BUT *2014-11-07* The graphics are HORRIBLE **Developer response:** I hope you are happier with the graphics for the calculator since 2020. ## Frequently asked questions about MathU 12D Financial Calculator ### What is MathU 12D? MathU 12D is a financial calculator app designed to emulate and surpass the functionality of the classic HP-12C. It uses Reverse Polish Notation (RPN) and offers enhanced features like visible financial registers and faster computation. ### Is MathU 12D easy to use for HP-12C users? Yes, MathU 12D is built to behave exactly like the HP-12C, using the same RPN system and mathematical functions. If you are familiar with the HP-12C, you should be able to use MathU 12D immediately. ### What are the key improvements MathU 12D offers over the HP-12C? MathU 12D features visible financial registers, significantly faster computation speeds, a two-line display for better visibility, and visible programming that displays function names instead of keypad locations. ### What devices does MathU 12D support? MathU 12D is available for iPhone, iPad, and macOS. It requires iOS 8.x or higher. ### How much does MathU 12D cost? MathU 12D is a paid application priced at $4.99. It does not have in-app purchases or ads. ### How often is MathU 12D updated? MathU 12D was first released in 2010 and continues to be updated with new features as iOS improves. The latest version is 4.1.3, last updated on February 23, 2026. ### What financial functions does MathU 12D support? MathU 12D supports a wide range of financial functions including time value of money (N, i, PV, PMT, FV), NPV, IRR, cash flows, bond pricing, and various depreciation methods. ### What is the user sentiment for MathU 12D? User reviews indicate positive sentiment, with one customer review stating, '5 stars - This app is great. Very Quick. Would highly recommend'. The app has an average rating of 4.1 stars from 16 ratings. ## Version history (last 5 releases) ### 4.1.4 — 2026-05-15 We are excited to announce that MathU 12D runs on macOS as well as iOS! Both Intel and Apple Silicon is supported for macOS. The 4.1.4 release fixes a minor layout bug I noticed after the previous release went live. Enjoy! All the calculator functions work on iPhone, iPad, and macOS. Keyboard support: An attached external keyboard can be used with the calculator to access the functions (type of name on the top if a button). Tap the Key Help button to see what strings will work to "press" a button on the keypad. ### 4.1.3 — 2026-02-23 We are excited to announce that MathU 12D runs on macOS as well as iOS! Both Intel and Apple Silicon is supported for macOS. The 4.1.3 release fixes a of couple of minor bugs I noticed after the 4.1.0 release went live. Enjoy! All the calculator functions work on iPhone, iPad, and macOS. Keyboard support: An attached external keyboard can be used with the calculator to access the functions (type of name on the top if a button). Tap the Key Help button to see what strings will work to "press" a button on the keypad. ### 4.1.2 — 2026-02-15 We are excited to announce that MathU 12D runs on macOS as well as iOS! Both Intel and Apple Silicon is supported for macOS. The 4.1.2 releases fixes a of couple of minor bugs I noticed after the last release went live. Enjoy! All the calculator functions work on iPhone, iPad, and macOS. Keyboard support: An attached external keyboard can be used with the calculator to access the functions (type of name on the top if a button). Tap the Key Help button to see what strings will work to "press" a button on the keypad. ### 4.1.0 — 2026-01-26 We are excited to announce that MathU 12D runs on macOS as well as iOS! Both Intel and Apple Silicon is supported for macOS. All the calculator functions work on iPhone, iPad, and macOS. Keyboard support: An attached external keyboard can be used with the calculator to access the functions (type of name on the top if a button). Tap the Key Help button to see what strings will work to "press" a button on the keypad. ### 4.0.2 — 2023-11-18 MathU 12D 4.0.2 adds: - support for bluetooth keyboard so you can "press" buttons by typing the name of the key on the calculator - support for iOS 16.x and iOS 17.x - bug fix for copy & paste feature that wasn't working with MathU 12D 4.0.0 - bug fix for random crashes MathU 12D also runs on macOS with Silicon! ## Apps similar to MathU 12D Financial Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Financial Calculator: Percent](https://appshunter.io/ios/app/financial-calculator-percent/id957134762) | 4.7 (14,664) | Free | Finance | | [10bii Financial Calculator](https://appshunter.io/ios/app/10bii-financial-calculator/id360256797) | 4.7 (662) | $5.99 | Finance | | [Loan Calculator‰](https://appshunter.io/ios/app/loan-calculator/id558688927) | 4.9 (104,929) | Free | Finance | | [Loan Calculator - Loan2Me](https://appshunter.io/ios/app/loan-calculator-loan2me/id1442980816) | 4.8 (8,234) | Free | Finance | | [EZ Financial Calculators](https://appshunter.io/ios/app/ez-financial-calculators/id494170744) | 4.4 (51) | Free | Finance | | [Loan Calculator - Debt Planner](https://appshunter.io/ios/app/loan-calculator-debt-planner/id1059124601) | 4.6 (22,434) | Free | Finance | ## More apps by Creative Creek, LLC - [MathU RPN Calc](https://appshunter.io/ios/app/mathu-rpn-calc/id293653078) All apps by Creative Creek, LLC: https://appshunter.io/developer/293653081 ## Related topics [hp calculator financial](https://appshunter.io/ios/topics/hp-calculator-financial) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*