12Calc vs RLM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
12Calc
This app provides a full-featured financial calculator experience, replicating the functionality of a popular physical model. It offers an audit tape for tracking calculations, a unit converter with currency exchange rates, and various worksheets with interactive graphs for financial analysis. Optimized for modern devices with high-resolution graphics and support for multiple orientations.
- HP12C emulation
- Audit tape for calculation history
- Unit and currency converter
- Interactive financial worksheets
- Portrait and landscape views
- Contextual help and tutorials
- HD graphics with color themes
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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.
RLM
This app is a powerful financial and business calculator designed for iOS devices, replicating the functionality of the HP-12C with expanded features. It offers comprehensive tools for finance, business calculations, statistics, scientific functions, and unit conversions.
- 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
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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.
Screenshots
Verdict
The clearest difference is price: RLM at Free against 12Calc's $8.99. RLM also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (15.0 vs 17.6). 12Calc's advantage is in-app purchases (none vs 4) and rating (4.9 vs 4.5). On review sentiment, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
RLM is free to download; 12Calc costs $8.99 up front. RLM sells 4 in-app purchases, starting at $0.49 per month. 12Calc asks for nothing beyond the download.
12Calc holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: 12Calc has 924 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 96% of 12Calc's written reviews are positive against 90% of RLM's.
12Calc ships an update every 5 months, RLM every 5 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | 12Calc | RLM |
|---|---|---|
| Price | $8.99 | Free — better |
| Rating | 4.9 (924 ratings) — better | 4.5 (19 ratings) |
| Positive reviews | 95.9% of reviews — better | 90.0% of reviews |
| Number of ratings | 924 — better | 19 |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #138 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Ernest Brock | R.L.M. Software |
Customer experience
12Calc
RLM
In-app purchases
12Calc
No in-app purchases
RLM
- Monthtly Subscription$0.491 Month
- Semi annual Subscription$2.996 Months
- Annual Subscription$5.991 Year
- Lifetime Purchase$9.99







