PROG_CALC vs RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PROG_CALC
This app offers a programmable calculator with two distinct modes for daily computing and advanced mathematical functions. It supports system conversions between binary, octal, decimal, and hexadecimal, and allows for variable storage and code sharing.
- Basic and advanced calculation modes
- Syntax parser
- Variable storage and editing
- Binary, octal, decimal, hexadecimal conversion
- Built-in code examples
- Code sharing via QR code or file
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The programming calculator provides two modes of operation. It has built-in basic operation functions, syntax parser, and supports a variety of application scenarios. 【Basic calculation】 Basic mode provides basic calculator functions for daily computing applications. 【Mathematical function】 Built-in rich mathematical functions, easy to implement basic calculations. 【Variable Storage】 Provides variable storage function, can store intermediate calculation results in basic mode, import and export with one key during application, and edit mode provides variable browsing function to easily grasp calculation results. 【System conversion】 Support binary, octal, decimal, hexadecimal conversion to meet the computing needs of different platforms. 【Code Example】 With built-in code writing examples, you can easily learn computing methods and expand application scenarios. 【Code Sharing】 The code can be shared through a QR code or a file, and the application also supports reading files directly, or scanning a QR code, which can be written on a computer and applied on a mobile phone.
RPN
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This is a calculator app using Reversed Polish Notation (RPN) In Portrait mode, this app provides a basic calculator with the four arithmetic disciplines +, -, x, and /. In Landscape mode, 30 extra buttons are available providing most functions found on a scientific calculator. You can do trigonometry, logarithms, roots, probability, and more. RPN is neat because you can do fancy calculations without having to worry about parenthesis. Putting the operator after the operands allow the operator to infer which are its operands without the clarification offered by paranthesis. The built-in help function (?) provides a short description of each function. The settings page allows you to set the number format, number of decimals displayed, decimal separator and more.
Screenshots
Verdict
The clearest difference is update cadence: PROG_CALC at every 2 weeks against RPN's every 6 months. PROG_CALC also leads on device support (4 vs 2) and iOS requirement (13 vs 15.6). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PROG_CALC ships an update every 2 weeks, RPN every 6 months. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.
| Parameter | PROG_CALC | RPN |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPod |
| Requires iOS | 13 — better | 15.6 |
| Further details — not scored | ||
| Size | 78 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | 嘉欣 胡 | Joachim Seland Graff |
In-app purchases
PROG_CALC
No in-app purchases
RPN
No in-app purchases









