RLM vs my16c
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RLM
This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.
- Finance and Business calculations
- Date and Time interval calculations
- Advanced Statistics and Curve Fitting
- Complex Numbers and 3D Vectors
- Unit and Currency Conversions
- Equation Solver
- Programmable functions
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The RLM-10CX application is a general purpose calculator with a special focus in science and engineering. It is based in the Hewlett-Packard HP-10C calculator, but specially designed to bring up the most of your iOS devices and , at the same time, conserving the easy of use and all functions originally provided by the real calculator. >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. •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. •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 •Currency Exchange with on-line rates. •Percents & Margins: Calculates %Change, %Total and Business margins. Date / Time Menu: Calculates Date and Time intervals with all values at sight. >Statistics Menu: •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Curve Fitting: 6 Regression models to fit a curve based on two variables data samples. •Probability: Combinations, permutations, Normal, Exponential, t-Student and Weibull probability distributions. >Scientific Menu: •Complex Numbers: Operations and functions with complex numbers. •Logarithms, Trigonometric, Hyperbolic and Number Alteration functions. •Triangle Solution: Solves a Plane & Spherical triangles. •3D Vectors: Operations and functions with vectors in Cartesian, Spherical or Cylindrical coordinates. •Universal Constants: All the NIST-CODATA physical constants values and descriptions. •Units Conversion: Physical units conversion completely customizable. >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: 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.
my16c
This app emulates a legendary programmer's calculator from the 1980s, offering cycle-accurate performance and faithful reproduction of its features. It includes base conversions, bit manipulation, RPN, and programmability, with modern conveniences like iCloud sync and a dark interface.
- Cycle-accurate emulation
- Full base conversion (HEX, DEC, OCT, BIN)
- Bit operations
- RPN entry
- Programmable
- Authentic LCD display
- Word size control
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The programmer's calculator that defined an era — now in your pocket. my16C brings the legendary 16C Voyager series programmer's calculator back to life with cycle-accurate emulation running the original microcode. Every keystroke, every display flicker, every RPN operation — faithfully reproduced. WHY PROGRAMMERS LOVE THE 16C The 16C wasn't just a calculator — it was the essential tool for every serious programmer and computer engineer in the 1980s. Its unique combination of base conversions, bit manipulation, and RPN logic made it indispensable. Decades later, it remains unmatched. FEATURES • Cycle-accurate emulation — runs the original Voyager microcode, not a simulation • Full base conversion — HEX, DEC, OCT, and BIN at the press of a key • Bit operations — shifts, rotates, AND, OR, XOR, NOT, 1's and 2's complement • RPN entry — the efficient Reverse Polish Notation stack system • Programmable — write, store, and run programs just like the original • Authentic 7-segment LCD display with all original annunciators • Word size control (WSIZE) — work with 8, 16, 32, or 64-bit integers • Floating point mode for standard calculations • Unsigned and signed arithmetic modes BUILT FOR TODAY • iCloud sync — your calculator state follows you across devices • Native on iPhone and Mac — landscape optimized on iOS, resizable window on macOS • Full keyboard support on Mac — type numbers and operators directly • Dark interface faithful to the original Voyager design • Built-in Owner's Manual for quick reference TRY BEFORE YOU BUY my16C includes a free trial period so you can experience the full calculator before purchasing. A single one-time purchase unlocks the app forever — no subscriptions. Whether you're a software engineer debugging hex values, a retro computing enthusiast, or someone who remembers the original on their desk — my16C is the most authentic way to use the legendary 16C today.
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Verdict
The clearest difference is monetization model: RLM at free against my16c's free with in-app purchases. RLM also leads on iOS requirement (15.0 vs 26.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. RLM sells 1 one-off in-app purchase and my16c sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
RLM ships an update every 4 weeks, my16c fortnightly. The most recent releases landed on September 30, 2026 and October 24, 2026 respectively.
| Parameter | RLM | my16c |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | R.L.M. Software | Miroslav Perovic |
Customer experience
RLM
my16c
In-app purchases
RLM
- Lifetime Purchase$9.99
my16c
- Unlock Full App$9.99








