bcRPN vs Calccis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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 +
Calccis
This utility app offers advanced calculations using reverse Polish notation. It supports a wide range of functions including trigonometry, logarithms, and matrix operations for real, fractional, and complex numbers. An undo stack allows for up to 100 operations to be reversed.
- Reverse Polish Notation (RPN)
- Basic arithmetic
- Trigonometrical functions (degrees/radians)
- Logarithm and exponent calculations
- Real, fractional, and complex number support
- Matrix calculations
- Undo/Redo stack (100 operations)
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Calccis is a reverse polish notation (RPN) calculator. It supports basic arithmetic, trigonometrical, logarithm and exponent calculations for real, fractional, and complex numbers. Degrees and radians can be used for trigonometrical functions. You can perform matrix calculations, too. There is an undo stack, which supports undoing and redoing the 100 latest operations. Calccis does not copy or mimic any existing physical calculators. However, the operation of the stack has been influenced by how the stack works in the 1990s Hewlett-Packard HP-48 family of calculators.
Screenshots
Verdict
The clearest difference is update cadence: Calccis at every 3 weeks against bcRPN's every 22 months. Calccis also leads on rating (5.0 vs 4.8). bcRPN's advantage is ratings volume (8 vs 1) and iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and monetization model 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.
Calccis holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: bcRPN has 8 ratings behind it against 1, so its average is the more settled of the two.
bcRPN ships an update every 22 months, Calccis every 3 weeks. Both last shipped on November 3, 2026.
| Parameter | bcRPN | Calccis |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 22 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 0 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Wilkins | Jukka Aittola |
In-app purchases
bcRPN
No in-app purchases
Calccis
No in-app purchases
