RPN Calculus vs my59
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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 descriptionHide 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.
my59
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | RPN Calculus | my59 |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 11 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Braun | Miroslav Perovic |
In-app purchases
RPN Calculus
No in-app purchases
my59
- Monthly$0.991 Month
- Yearly$9.991 Year
- Unlock Full App$19.99









