Best Halcyon Calc alternatives: apps like Halcyon Calc

10+ similar apps compared and reviewed

4.8 avg rating
3 free apps
Updated November 2026

Looking for something like Halcyon Calc? 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 Halcyon Calc

RPN-67 SD#2

RPN-67 SD by CuVee Software

Vintage Programmable Calc
Strong Contender
🔧 Utilities
4.6(17 ratings)
$3.99
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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.

5.0(5 ratings)
$6.99
GO-29 SciRPN screenshot 1
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This app offers a highly accurate simulation of the classic HP-29C programmable scientific calculator. It features RPN input, extensive storage registers, and a wide range of mathematical and statistical functions. Users can program complex calculations, import/export programs, and view detailed program information.

More apps like Halcyon Calc

4
SwiftRPN
SwiftRPN
SwiftRPN
RPN At The Speed Of Light
Free

This utility app provides a powerful Reverse Polish Notation (RPN) calculator with advanced features. It supports scalar types, vectors, and matrices, along with extensive built-in operators and unit conversions. Easily switch between number bases and visualize results.

RPN stack for efficient calculationsSupport for scalar, vector, and matrix types84 built-in operators with documentation
🔧 Utilities
(1)
free
5
GO-25 SciRPN
GO-25 SciRPN
GO-25 SciRPN
by Steve Lidie
$4.99

This app faithfully recreates the HP-25C Programmable Scientific Calculator from 1976. It offers RPN input, a 10-digit LED display, and extensive mathematical functions. Users can program it with up to 99 steps and share programs via various methods.

RPN input10-digit LED displayFour stack registers
🔧 Utilities
(23)
paid
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
(10)
paid
7
Construction Calculator+++
Construction Calculator+++
Construction Calculator+++
Construction Math Calculator
$2.99

This app streamlines construction math with modules for length, width, and height calculations, material estimation for bricks and drywall, and complex rafter calculations. It also includes tools for circle and arc parameters, offering detailed visualizations.

Length, width, height calculationsMaterial estimation (bricks, drywall)Rafter calculations (hip, valley, jack)
🔧 Utilities
(3)
paid
8
Gen's Calculator
Gen's Calculator
Gen's Calculator
by GenPlaza inc.
Free
🔧 Utilities
(0)
9
AutoMathic
AutoMathic
AutoMathic
The Smart Calculator
$1.99

This smart calculator automates complex math problems by translating conversational input into solvable equations. It offers three modes: scripted calculations, manual expression entry, and free-form English input for problem-solving.

Automated problem solvingConversational input translationScripted calculations
🔧 Utilities
(2)
paid
10
DM50
DM50
DM50
Cheap and powerful calculator.
$0.99
🔧 Utilities
(0)