r.Calc vs 0xCalc
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.
0xCalc
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A no-fuss, intuitive calculator tailored for programmers and engineers. * There are no ads and no in-app purchases in this app. Your purchase gets you all features, forever. * This calculator works just like a normal calculator, plus: - When entering a calculation, the last number and operator entered are displayed. - When hitting '=', the full calculation, as well as the result, are displayed. Features - Switch between Binary, Octal, Decimal, and Hexadecimal - A full 64-bit binary representation is visible at all times. - Basic Operations: add, subtract, multiply, divide - Bitwise Operations: AND, OR, XOR, NOR - Shift Operations - Rotate Operations - 1's and 2's Compliment - Hide the second through fourth row of operators when not needed.
Screenshots
Verdict
The clearest difference is iOS requirement: r.Calc at 2.2.1 against 0xCalc's 17.0. On price, 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
r.Calc costs $0.99 and 0xCalc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | r.Calc | 0xCalc |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 197 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 2.2.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 0 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Nicolas Jorand | Thomas J Foster |
In-app purchases
r.Calc
No in-app purchases
0xCalc
No in-app purchases









