Comparison

RPN Calculus vs my59

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

Head to head
About

RPN Calculus

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.

Highlights
  • RPN (Reverse Polish Notation) interface
  • Basic and advanced mathematical functions
  • High precision calculations (up to 15 digits)
  • Extensive scientific constant database
  • User-extendable constant database
  • Memory space for values
Read full description

RPN Calculus is a scientific RPN Calculator for the Apple iPad. RPN Calculus provides basic arithmetic operations as well as advanced mathematic operations like trigonometric, hyperbolic or logarithmic functions. The calculator app provides an unlimited, well, limited by system resources, amount of memory space for values. RPN Calculus performs calculations with a precision of up to 15 digits and supports a number range from -1E127 to 1E127. It's smallest presentable number is 1E-128. RPN Calculus offers a clean and simple layout, very common if you have used scientific RPN calculators before. RPN Calculus has a build in constant values database. The database contains over 120 scientific constants of different categories like e.g. Mathematics, Physics or Astronomy. Since the constants database is user extendable, you can add constant values that you are may be missing in the default set of constants. RPN Calculus can print out your values on the stack and the memory.

About

my59

Features
Read full description

Experience the power and authenticity of a classic programmable calculator from the late 1970s directly on your iPhone, iPad, and Mac. my59 is not just a calculator app; it is a faithful, highly accurate emulator that brings a piece of computing history into the modern era. Whether you are an engineer, a student, a retro-computing enthusiast, or simply someone who appreciates the raw power of vintage programmable calculators, my59 delivers an authentic, uncompromised experience enhanced with the latest Apple ecosystem features. KEY FEATURES: Authentic Design & Feel: A meticulously crafted interface inspired by classic programmable calculators of the era, complete with a faithful keypad layout and display. Full Emulation: Supports the complete original instruction set, memory registers, and programming logic. Write and execute programs just as you would on the original hardware. Modern Workspace: Fully optimized for all screen sizes, including seamless portrait and landscape modes on iPad, and native support for Apple Silicon Macs. Built-in Documentation: Never get stuck. Full documentation, manuals, and quick references are integrated directly into the app for easy access. UNLOCK FULL POWER (Premium): my59 is free to download and try. Upgrading to Premium (available as a flexible subscription or a lifetime one-time purchase) unlocks the ultimate workstation: Complete Module Library: Get unrestricted access to all expansion packs and library modules. iCloud Sync: Keep your programs, memory state, and modules seamlessly synchronized across your iPhone, iPad, and Mac. Advanced Saving & Sharing: Save an unlimited number of custom programs and easily share them with other users. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ This app is an independent project and is not affiliated with, endorsed by, or connected to Texas Instruments Inc. or any of its subsidiaries.

Screenshots

my594 screens

Verdict

The call

The clearest difference is price: my59 at Free against RPN Calculus's $1.99. my59 also leads on update cadence (every 2 weeks vs every 4 months) and device support (3 vs 1). RPN Calculus's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 26.0). On 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

my59 is free to download; RPN Calculus costs $1.99 up front. my59 sells 3 in-app purchases, starting at $0.99 per month. RPN Calculus asks for nothing beyond the download.

UpkeepUpdate frequency

RPN Calculus ships an update every 4 months, my59 every 2 weeks. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
RPN Calculus versus my59: the parameters behind the verdict, then further details
ParameterRPN Calculusmy59
Price$1.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPadiPhone, iPad, Mac — better
Requires iOS12.0 — better26.0
Further details — not scored
Size11 MB11 MB
Age rating4+4+
DeveloperThomas BraunMiroslav Perovic

In-app purchases

None

RPN Calculus

No in-app purchases

3 purchases

my59

Subscriptions2
  • Monthly$0.991 Month
  • Yearly$9.991 Year
One-time1
  • Unlock Full App$19.99

Questions

Is RPN Calculus free?
RPN Calculus costs $1.99, with no in-app purchases.
Is my59 free?
my59 is free to download, with in-app purchases available.
Do RPN Calculus or my59 have ads?
Neither RPN Calculus nor my59 shows ads.
Which is updated more often, RPN Calculus or my59?
RPN Calculus ships an update every 4 months, and my59 every 2 weeks. Most recently, RPN Calculus was updated on October 14, 2026 and my59 on October 24, 2026.

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