Best apps like RLM-11CX

10+ similar apps compared and reviewed

4.4 avg rating
6 free apps
Updated August 2026

Looking for something like RLM? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to RLM

bcRPN#1

bcRPN by Paul Wilkins

Editor's Choice
🔧 Utilities
4.8(4 ratings)
Free
bcRPN screenshot 1

This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.

Complex RPN Calculator#2

Complex RPN Calculator by John Coddington

Complex Numbers RPN Calculator
Strong Contender
🔧 Utilities
3.8😐(22 ratings)
Free
Complex RPN Calculator screenshot 1
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Complex RPN Calculator screenshot 6

This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.

What We Love

  • ✅ Great RPN functionality
  • ✨ Complex number support
  • 🆓 Free to use
  • 🚫 No ads or in-app purchases

Room to Improve

  • 🎨 SwiftUI design is ugly
  • 🐌 Slow keyboard response
  • 🖱️ Clunky operation
Plus42#3

Plus42 by Thomas Okken

Enhanced HP-42S Calc Simulator
Worth Considering
🔧 Utilities
4.9(79 ratings)
$9.99
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This advanced scientific calculator simulates the classic HP-42S RPN calculator with enhanced features. It offers algebraic expressions, unit conversions, directories for storage, a larger resizable display, financial functions, and 2D plotting with integral and root finding.

More apps like RLM

4
my41CX
my41CX
my41CX
HP-41 Microcode Emulator
Free

Experience the most accurate HP-41CX calculator emulation. This app provides full microcode-level emulation of the original NUT processor, ensuring 100% hardware-accurate behavior. It features a modern interface, expandable ROM modules, and built-in documentation for a classic yet contemporary user experience.

True microcode emulationModern user interfaceExpandable with ROM modules
🔧 Utilities
(2)
free with in-app purchases
5
RCL-57
RCL-57
RCL-57
by Paul Novaes
Free

This app faithfully recreates the TI-57 programmable calculator, offering its full scientific functions and programming capabilities. It includes a user manual, sample programs, and features like turbo speed and alphanumeric display.

TI-57 recreationScientific functionsProgramming capabilities
🔧 Utilities
(0)
free
6
RPN-25 CE
RPN-25 CE
RPN-25 CE
Highly popular 1975 calculator
$2.99

This app is a photo-realistic simulation of the classic HP-25 scientific calculator. It offers advanced programming features, a vast function library, and modern enhancements for enhanced usability on iOS devices.

Photo-realistic simulationProgrammable (99/999 steps)15 user-defined function keys
🔧 Utilities
(9)
paid
7
RPN-67 SD
RPN-67 SD
RPN-67 SD
Vintage Programmable Calc
$3.99

This app simulates a vintage programmable calculator from the mid-70s, offering enhanced features beyond the original. It allows users to run existing programs, manage virtual cards, and utilize advanced functions for scientific and engineering tasks.

Virtual program and data cardsVirtual paper tape printerDatabase-driven card manager
🔧 Utilities
(16)
paid
8
Halcyon Calc Lite
Halcyon Calc Lite
Halcyon Calc Lite
by Halcyon Touch Software
Free

This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.

Symbolic expression manipulationGraphing of expressionsMatrix and vector calculations
🔧 Utilities
(15)
free with in-app purchases
9
HP-35
HP-35
HP-35
RPN Calculator. HP-35, 45, 21
Free

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

RPN calculator emulationHP-35 modelHP-45 model
🔧 Utilities
(5)
free
10
HP15C: Scientific Calculator
HP15C: Scientific Calculator
HP15C: Scientific Calculator
Classic Science Calc for you
$4.99

Relive the classic computing experience with a vintage scientific calculator. This app emulates a beloved 90s model, offering a nostalgic and functional tool for calculations.

Vintage scientific calculator emulationClassic 90s designFunctional for scientific calculations
🔧 Utilities
(3)
paid