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.
4.6(9 ratings)
$2.99
Best apps like GO-21 SciRPN
10+ similar apps compared and reviewed
4.3 avg rating
2 free apps
Updated July 2026
Whether you want more options like GO or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.
Top Alternatives to GO
4.6(16 ratings)
$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.
4.9(11 ratings)
$4.99
This app simulates a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run programs, manage virtual cards, and access hundreds of free program cards from its website.
More apps like GO
4
RPN Calc
by James Mattis
$0.99
This app provides a straightforward reverse Polish notation (RPN) calculator experience, inspired by classic HP models. It offers a clean interface with large buttons for quick calculations on iPhone, iPad, and Apple Watch, along with a convenient Today Extension for immediate access.
Reverse Polish Notation (RPN) inputClean, simple interfaceLarge, easy-to-press buttons
🔧 Utilities
(4)
free5
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
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(0)
free6
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)
free7
BVCalc
Enhanced dual mode calculator
$4.99
🔧 Utilities
(0)
8
Codex Calc
by Driftwood Studio Software LLC
$0.99
This app offers a powerful yet intuitive calculator experience with a variety of modes including scientific, unit conversion, and tip calculation. It features a customizable interface and a detailed history tape for all your calculations.
Full scientific calculator functionsUnit converterTip calculator
🔧 Utilities
(1)
paid9
My RPN Calculator
My RPN Calculator
$4.99
🔧 Utilities
(0)
10
RPN Calculus
by Thomas Braun
$1.99
This scientific calculator app for iPad offers a clean RPN interface with basic and advanced functions. It supports high precision calculations and provides an extensive, user-extendable database of scientific constants.
RPN (Reverse Polish Notation) interfaceBasic and advanced mathematical functionsHigh precision calculations (up to 15 digits)
🔧 Utilities
(1)
paid