Comparison

RLM vs SwiftRPN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

SwiftRPN

Read full description

SwiftRPN is an RPN (Reverse Polish Notation) calculator that aims to be quick to open and easy to use. = RPN Stack Work quickly and efficiently using the RPN Stack by pushing and popping values. The stack will always show what series of inputs led to each output, so you won't lose context during complicated expressions. = Extended Types SwiftRPN can understand scalar types like integers and real numbers, as well as vectors and square matrices of sizes 2, 3, and 4. When operating purely in the scalar integer domain, SwiftRPN can promote up to BigInts to avoid floating point imprecision. = Operators SwiftRPN has 84 built-in operators with included documentation and examples. All the expected operators (basic arithmetic, exponents, logarithms) are present, as are: - Rounding functions (floor/ceil/trunc/round) - Unit conversions - Bitwise operations (and/or/not/xor/shift left/shift right) - Statistics (avg/min/max/sum/std dev/NPV) - Trigonometry (sin/cos/tan + arc/hyperbolic variants) - Vector operations (dot/cross/normalize/length/swizzle) - Matrix operations (identity/inverse/transpose + translation/scale/rotation matrix generators) = Unit Conversions SwiftRPN has 74 built-in units, and can convert between units within families, including: - Angle - Area - Colors (3 and 4 components) - Coordinate systems (2D and 3D) - Length - Mass - Storage (Base 10 [SI, 1000 bytes in a kb] and Base 2 [1024 bytes in a kb]) - Temperature - Time - Volume = Value Representation SwiftRPN recognizes values represented in binary, octal, decimal, and hexidecimal. You can: - Enter values in one representation, and convert them to another - See the result of bitwise operations in binary automatically - View vec3 and vec4 components (truncated) in hexidecimal when working with colors.

Screenshots

RLM4 screens
SwiftRPN4 screens

Verdict

The call

The clearest difference is in-app purchases: SwiftRPN at none against RLM's 1. RLM's advantage is update cadence (every 4 weeks vs every 14 months) and iOS requirement (15.0 vs 17.6). On price, rating, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RLM sells 1 one-off in-app purchase. SwiftRPN asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for RLM against 5.0 for SwiftRPN. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

RLM ships an update every 4 weeks, SwiftRPN every 14 months. The most recent releases landed on September 30, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
RLM versus SwiftRPN: the parameters behind the verdict, then further details
ParameterRLMSwiftRPN
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 4 weeks — betterEvery 14 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size6 MB3 MB
Age rating4+4+
DeveloperR.L.M. SoftwarePatrick Gelvin

Customer experience

RLM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SwiftRPN

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

RLM

One-time1
  • Lifetime Purchase$9.99
None

SwiftRPN

No in-app purchases

Questions

Is RLM free?
RLM is free to download, with in-app purchases available.
Is SwiftRPN free?
SwiftRPN is free to download, with no in-app purchases.
Which has better reviews, RLM or SwiftRPN?
RLM and SwiftRPN are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do RLM or SwiftRPN have ads?
Neither RLM nor SwiftRPN shows ads.
Which is updated more often, RLM or SwiftRPN?
RLM ships an update every 4 weeks, and SwiftRPN every 14 months. Most recently, RLM was updated on September 30, 2026 and SwiftRPN on October 24, 2026.

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