# RLM-12CX — Finance & Business Calculator > Advanced finance and business calculator for iOS, inspired by the HP-12C. (iPhone/iPad app by R.L.M. Software.) - Source: https://appshunter.io/ios/app/rlm-12cx/id1613759385 (this page in markdown: same URL + `.md`) - Developer: [R.L.M. Software](https://appshunter.io/developer/289639238) - Category: Finance, Business - Price: Free with in-app purchases - Rating: 4.50/5 from 18 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 5 MB - Languages: American English - Released: 2022-05-19 - Data updated: 2026-08-24 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/rlm-12cx/id1613759385/reviews.md ## What is RLM? The RLM-12CX application is a general purpose calculator with a special focus in finance and business. It is based in the Hewlett-Packard HP-12C calculator, but specially designed to bring up the most of your iOS devices. With all the functions originally provided by the real calculator and expanded with complete set of menus and worksheets. >Finance Menu: •Account Balance: Credit line type account based on cash transactions and interest rates applied. •Amortization: Loan Amortization Schedule for a single loan payment or from several payments at once. •Bond Price & Yield: Bonds calculations in an easy way with all options and values at sight. •Black-Scholes Options: CALL, PUT and “Greeks” calculations of the Black-Scholes European option valuation model. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. values at sight. •Interest Conversion: Nominal and effective interest conversion. •Time Value of Money: Compound Interest problems involving money earning interest over a period of time. >Business Menu: •Bill-Tip-Split: Calculates the sharing of a Bill with Tip. •Break-Even: Analyze the following relation: Profit = (Price - Var.Cost) • Units - Fix.Cost •Date/Time: Calculates Date and Time intervals with all values at sight. •Currency Exchange with on-line rates. •Percents & Margins: Calculates %Change, %Total and Business margins. >Cash Flows Menu: •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. >Statistics Menu: •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Probability: Combinations, permutations and Normal, Exponential, t-Student and Weibull probability distributions. >Scientific Menu: •Angles & Polar: Convert angles and coordinates. •Logarithm functions with common or arbitrary base. •Number Alteration functions •Triangle Solution: Solves a plane triangle. •Trigonometric & Hyperbolic functions. >Convert Menu: •Angles & Polar: Convert angles between DEG,RAD,GRAD,DMS or Slope % & Polar-Rectangular coordinates. •Currencies: world currencies conversions with manual input or on-line current rates. •Interest Rates: Nominal and effective interest conversion. •Units: Physical units conversions. >Program Menu Create, edit or load previously saved programs. >Solver Menu Solve arbitrary algebraic equations entered and saved in the equation editor and creates a menu with all the variables to solve any of them. >Utilities Menu •General Settings: Customize the calculator to your preference. •Storage Registers: Store and perform operations directly over the calculator’s storage registers. •Memory Content: Shows all memory content edit, backup or restore. •Help Documents: learn by example about all menus. >Editors: submenu to select data editors. System requirements: iOS 15.0 or above. 30 days Free-Trial. In-App-Purchase: Monthly, Semi-Annual and Annual Auto-renewable subscriptions or One-Payment for life. License Agreement: http://www.apple.com/legal/itunes/appstore/dev/stdeula Disclaimer: THIS IS NOT A HEWLETT PACKARD CALCULATOR, AND IS NOT SPONSORED IN ANYWAY BY HEWLETT PACKARD OR ANY OF ITS SUBSIDIARIES. ## Key features - Finance and business calculations - Amortization schedules - Bond price and yield calculations - Black-Scholes options valuation - Depreciation methods - Currency and unit conversions - Statistical analysis - Programmable functions ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthtly Subscription | $0.49 | per month | | Semi annual Subscription | $2.99 | per 6 months | | Annual Subscription | $5.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime Purchase | $9.99 | one-time | ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/rlm-12cx/id1613759385/reviews.md ### 4/5 — Full Access Granted MESSAGE *2025-02-04* I keep receiving a message from time to time informing “life time purchase” but with button to click “ok”. If purchase is for life time and paid for why I keep receiving the message on the calculator screen forcing me to click ok? Pls advice. On else, it is a great product— Tks ### 5/5 — What happened to the left arrow key? *2025-01-10* This is a Great calculator. I thought that the left arrow key had been replaced by the CLX key, but I found out that there are options to set the behavior of the key. Everything is great again!! ### 4/5 — What happened to the left arrow key? *2025-01-05* I loved the first version of this calculator! Then when I upgraded, I lost the left arrow key so my only option when I miskey a number is to hit CLX and reenter the whole number - what a pain in large numbers!!! Why was the left Arrow removed!! Bring it back!!!! I hate the CLx key. ### 4/5 — Great app - issue with Logitech MX Keyboard *2024-11-01* This is a great app. Wish it stayed free like others. The ENTER key on Logitech MX Keyboard doesn't work. Have to use the Return key to enter values. ### 4/5 — Bug on 1/x Key *2024-09-28* The inverse X value result hardly comes up after a simple press on the key. Try to insert any valeu and ask 1/x to calculate, hardly ever you get the result immediately. Sometimes after many tries you get it, normally nothing. Once I decided to hold and release the 1/x key to see its behavior, so the bug had apparently gone away, but for a few tries, more attempts and then it was back again. Right now it’s not working. **Developer response:** We couldn't reproduce any 1/X problem. Please check if the problem is the same in Portrait and Landscape layout. Maybe there is dirt or malfunction of the device screen in the are where the button is. ### 5/5 — Great Calculator *2023-12-20* This is a great calculator. It has more functions than I’ll ever use. It is well worth $9.99. ### 4/5 — Portrait orientation doesn’t work on iPad *2023-10-15* Very nice calculator. Only issues I’ve seen are that portrait orientation doesn’t work on my iPad and show registers doesn’t work (shows briefly, then disappears). Issues aren’t deal breakers. Calc worth the money. **Developer response:** In the iPad, the portrait layout is shown only if you have a Split View that reduces significantly the width of the app respect to the height available. The default and preferred layout is landscape as the real world HP-12C. About the Registers, they are shown if the option is set to ON in the Preferences (g PREF) and no menu is shown in the screen side area (toggle with the OPT key). ### 2/5 — Use caution - demo only - after 30 days will charge *2023-08-07* This was not clearly described. The app states it will charge your account after 30 days (according to the opening screen). Use caution. Pressing OK to start the trial may commit you to a $9.99 charge. Not transparent and poorly worded in description. **Developer response:** After the 30 days trial you are ask to pay for the App. You have to approved by you. There isn't and automatic charge. ### 4/5 — Show registers doesn’t work on iPad. *2023-08-03* Show’s briefly but then disappears. Works fine on iPhone. ### 5/5 — 12C emulator stands the rest of time *2022-07-31* I first began using RLM’s HP emulators when I purchased my first iPhone; that has to be at least 10 years ago. The app has continuously evolved and been updated for compatibility with larger displays and OS requirements. I’ve tried at least five 12C emulators and have always returned to this app because there is no lag with data entry, calculations are fast, and I’ve yet to find a bug. My questions to the developer have always been responded to quickly and in an enthusiastic manner. I don’t mind paying annual subscriptions for the apps that being me value. It should have been obvious to Apple when App Store was in its infancy that one-time purchases of apps for $0.99 would not create a sustainable business model for developers which explains the sea of abandonware that resulted. This app is a small price to pay to keep it sustainable and compensate the developer for his efforts. I highly recommend it. **Developer response:** Thank you very much for your rating. It encourage us to build top quality and usable calculators for iOS. ## Frequently asked questions about RLM ### What financial calculations can RLM-12CX perform? RLM-12CX offers a wide range of financial calculations including account balance, loan amortization, bond price and yield, Black-Scholes options valuation, depreciation methods, and interest rate conversions. It also handles time value of money problems. ### Does RLM-12CX support business-related calculations? Yes, RLM-12CX includes a dedicated business menu for calculations such as bill splitting with tip, break-even analysis, date and time intervals, currency exchange with online rates, and percentage/margin calculations. ### What statistical functions are available in RLM-12CX? The app provides tools for one-variable and two-variable statistics. It also includes probability calculations for combinations, permutations, and various distributions like Normal, Exponential, t-Student, and Weibull. ### Can RLM-12CX perform unit and currency conversions? Yes, RLM-12CX features a comprehensive Convert menu that supports angle conversions, currency conversions with online rates, interest rate conversions, and physical unit conversions. ### Is RLM-12CX available for free? RLM-12CX is free to download and use, with in-app purchases available for subscription plans. The app offers a 30-day free trial for its subscription features. ### What are the subscription options for RLM-12CX? RLM-12CX offers monthly ($0.49/P1M), semi-annual ($2.99/P6M), and annual ($5.99/P1Y) subscription plans. These plans likely unlock premium features or remove limitations. ### What system requirements does RLM-12CX have? RLM-12CX requires iOS 15.0 or above and is compatible with iPhone, iPad, and iPod. The latest version is 2.1.5, last updated on April 26, 2024. ### How is the user sentiment for RLM-12CX? RLM-12CX has a strong rating of 4.5 stars from 18 ratings, indicating positive user sentiment. Users generally appreciate its comprehensive functionality and HP-12C emulation. ## Version history (last 5 releases) ### 2.1.5 — 2024-04-26 Now you can listen music while using the calculator. ### 2.1.4 — 2024-04-04 New editor for the Unit Conversion Database. Fix a problem with some devices involving the edition of a units conversions and categories in the database. ### 2.1.3 — 2024-03-07 Fix a bug regarding Accessibility Setting that affect the look of the interface. Now is always drawn well. ### 2.1.2 — 2024-02-18 Fix the issue of Currency Exchange menu where the "Get Rate" stop working since February 16th, 2024. ### 2.1.1 — 2024-02-11 Enabling a 'Return' keyboard equivalence for the ENTER key. ## Apps similar to RLM | App | Rating | Price | Category | | --- | --- | --- | --- | | [Greatweek.com](https://appshunter.io/ios/app/greatweekcom/id1662945960) | 5.0 (1) | Free | Finance | | [Signal Crypto Pro & trading](https://appshunter.io/ios/app/signal-crypto-pro-and-trading/id1665185840) | 5.0 (1) | Free | Finance | | [YKIB Digital Lite](https://appshunter.io/ios/app/ykib-digital-lite/id1661471720) | 4.7 (3) | Free | Finance | | [Savita](https://appshunter.io/ios/app/savita/id1664110660) | 4.0 (32) | Free | Finance | | [Infoexperto](https://appshunter.io/ios/app/infoexperto/id1663240840) | — | Free | Finance | | [Parali](https://appshunter.io/ios/app/parali/id6443763240) | — | Free | Finance | ## More apps by R.L.M. Software - [RLM-10BX](https://appshunter.io/ios/app/rlm-10bx/id1563019331) - [RLM-17BX](https://appshunter.io/ios/app/rlm-17bx/id1593889938) - [RLM-19BX](https://appshunter.io/ios/app/rlm-19bx/id1597086394) - [RLM-12PX](https://appshunter.io/ios/app/rlm-12px/id1613770734) - [RLM-11CX](https://appshunter.io/ios/app/rlm-11cx/id1630739014) All apps by R.L.M. Software: https://appshunter.io/developer/289639238 ## Related topics [twelvec](https://appshunter.io/ios/topics/twelvec) · [touch rpn](https://appshunter.io/ios/topics/touch-rpn) · [hp calculator 12c](https://appshunter.io/ios/topics/hp-calculator-12c) · [hp 12c](https://appshunter.io/ios/topics/hp-12c) · [hp twelvec](https://appshunter.io/ios/topics/hp-twelvec) --- *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 2026-08-24.*