CaIculator vs RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CaIculator
A simple and intuitive calculator app designed for ease of use. It offers features like a backspace key, decimal point/comma support, calculation history, and customizable themes. Regular updates ensure continuous improvement.
- Intuitive interface with large buttons
- Backspace key for corrections
- Decimal point or comma support
- Calculation history display
- Two customizable themes
- Regular updates with new features
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Calculator app. Simple, easy to use, and packed with features to help you get the job done. Our calculator is designed with you in mind, whether you're a student, a professional, or just need to do some quick calculations. Our calculator app features a sleek and intuitive interface, with large buttons and a clear display for easy input and output. Plus, with the backspace key you can correct or change numbers. Other features of our calculator app include support for decimal point or decimal comma, a display log for your calculation, and two themes to choose from!. And with regular updates and new features being added all the time, our calculator app is always improving and getting even better. Download our calculator app today and experience the ultimate in calculation convenience and accuracy!
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: CaIculator at Free against RPN's $4.99. CaIculator also leads on iOS requirement (12.0 vs 16.6). RPN's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support 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
CaIculator is free to download; RPN costs $4.99 up front. CaIculator sells 1 one-off in-app purchase. RPN asks for nothing beyond the download.
CaIculator ships an update every 5 months, RPN every 7 months. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.
| Parameter | CaIculator | RPN |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.9 (27 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 27 — better | — |
| Update frequency | Every 5 months — better | Every 7 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 61 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Edison Largo | Steven Davies |
In-app purchases
CaIculator
- Remove Ads$3.99
RPN
No in-app purchases
Questions
Is CaIculator free?
Is RPN free?
Do CaIculator or RPN have ads?
Which is updated more often, CaIculator or RPN?
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