PuchCalc vs RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PuchCalc
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<Fashionable function> You can choose the design from 13 themes. You can also change the shape and font of the buttons, expanding the range of designs. <Convenient for shopping> Just add them in the order of purchase, and the total amount will be displayed in the history. ・In parentheses are tax-included ・When automatic recalculation is on, the calculation history can be recalculated. Even if you add it by mistake, it will be automatically recalculated by deleting the wrong line. ・Consumption tax calculation is also displayed automatically. <Calculation history function> The calculation remains as a history and can be reconfirmed after the calculation. The calculation history can be shared externally, and can be sent to e-mail, Twitter, etc. Features) ・Fashionable function:You can choose the overall design, button shape and font. ・Calculation history function:The calculation remains as a calculation history. ・Calculation history sharing function:The calculation history can be sent to an external compatible app. ・Compatible with iPad ・Language support:It is displayed in the supported languages according to the set languages of Japanese, English, and iOS. *Advertisement will be displayed. *Advertisement non-display PuchCalc Pro is also available, please use it.
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: PuchCalc at Free against RPN's $4.99. PuchCalc also leads on update cadence (monthly vs every 7 months) and iOS requirement (14.1 vs 16.6). RPN's advantage is ads (none vs shown). On in-app purchases 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
PuchCalc is free to download; RPN costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PuchCalc ships an update monthly, RPN every 7 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.
| Parameter | PuchCalc | RPN |
|---|---|---|
| Price | Free — better | $4.99 |
| Update frequency | Monthly — better | Every 7 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.1 — better | 16.6 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Jutaro Kimura | Steven Davies |
In-app purchases
PuchCalc
No in-app purchases
RPN
No in-app purchases
Questions
Is PuchCalc free?
Is RPN free?
Do PuchCalc or RPN have ads?
Which is updated more often, PuchCalc or RPN?
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