RPN Calculus vs RPN
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
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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.
RPN
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The basic four function calculator displays numbers in fixed format. The scientific calculator has 75 built-in functions covering logarithms, powers, roots, trigonometric, date, time, memory operations, statistics, and probabilities and up to four user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The user configurable calculator has sixteen user configurable function buttons that can each be assigned two functions from 75 built-in functions and access an unlimited number of user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The programmer’s calculator has a hexadecimal keypad and displays numbers in user configurable hexadecimal format. It has four basic mathematics, six bitwise, and two shift functions. All calculators share an operation history display for ease of reviewing computations and extensive in-app help documentation. Numbers can be copied to and pasted from the clipboard for ease of use with other applications.
Screenshots
Verdict
The clearest difference is price: RPN Calculus at $1.99 against RPN's $4.99. RPN Calculus also leads on iOS requirement (12.0 vs 16.6). RPN's advantage is device support (3 vs 1). On update cadence, ads and in-app purchases 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
RPN Calculus costs $1.99 and RPN $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RPN Calculus ships an update every 4 months, RPN every 7 months. The most recent releases landed on October 14, 2026 and October 27, 2026 respectively.
| Parameter | RPN Calculus | RPN |
|---|---|---|
| Price | $1.99 — better | $4.99 |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 11 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Braun | Steven Davies |
In-app purchases
RPN Calculus
No in-app purchases
RPN
No in-app purchases
Questions
Is RPN Calculus free?
Is RPN free?
Do RPN Calculus or RPN have ads?
Which is updated more often, RPN Calculus or RPN?
Other comparisons
