r.Calc vs bcRPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
r.Calc
A straightforward calculator utilizing Reverse Polish Notation (RPN) for everyday calculations. It offers a four-level visible stack with a total capacity of 100 positions, providing visual feedback on stack fullness. Basic arithmetic operations and stack manipulation functions are included.
- Reverse Polish Notation (RPN) input
- Four visible stack levels
- 100-position stack capacity
- Progress bar for stack fullness
- Basic arithmetic operations
- Stack swap and recall functions
- Vibration feedback for errors
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This classic RPN (Reverse Polish Notation) calculator is a simple calculator for daily uses. The calculator features a four visible level stack, the total stack size has a total of hundred positions. A progress bar on the top of the screen shows you how the stack is full. For now the implemented operations are; Plus, Minus, Multiply, Divide, Opposite, Inverse. Other facilities like swap the first two number in the stack and recall from the last operation the two arguments should simplify the life. All keyboard errors are notified by a vibration.
bcRPN
This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.
- Reverse Polish Notation (RPN) input
- Complex number calculations
- Extended precision math
- Unlimited stack depth
- Undo functionality (up to 10 operations)
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This is a RPN (Reverse Polish Notation) Calculator. It supports complex numbers and uses extended precision math for all operations. The stack depth is unlimited. In case a mistake was made, up to 10 operations can be undone. RPN calculators work by entering the numbers on the stack first, then selecting the operation. For example to add 3 + 4, press: 3 Enter 4 +
Screenshots
Verdict
The clearest difference is price: bcRPN at Free against r.Calc's $0.99. bcRPN also leads on rating (4.8 vs 4.0) and update cadence (every 22 months vs every 197 months). r.Calc's advantage is review sentiment (100% vs 80%) and iOS requirement (2.2.1 vs 15.0). On ratings volume, ads, 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
bcRPN is free to download; r.Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
bcRPN holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews complicate that: 100% of r.Calc's written reviews are positive against 80% of bcRPN's, so the app with the better star average is not the one people write more warmly about.
r.Calc ships an update every 197 months, bcRPN every 22 months. The most recent releases landed on June 10, 2026 and October 7, 2026 respectively.
| Parameter | r.Calc | bcRPN |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (3 ratings) | 4.8 (4 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 197 months | Every 22 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 2.2.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 0 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Nicolas Jorand | Paul Wilkins |
Customer experience
r.Calc
bcRPN
In-app purchases
r.Calc
No in-app purchases
bcRPN
No in-app purchases
