Scientific Calculator++ vs SwiftRPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scientific Calculator++
This powerful calculator app offers advanced functions for complex calculations, including fraction manipulation, angle conversions, and equation solving. It features a history of your calculations and a user-friendly interface designed for iPad.
- Calculation history
- Fraction manipulation
- Angle conversion (degrees, minutes, seconds)
- Permutation and combination calculations
- LCM and GCD
- Equation solver
- Coordinate conversion
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The creators of 5-star Scientific++ and Statistics Calculator++ redesigned Scientific Calculator++ exclusively for iPad. Please note that the statistics features that you see in the screen shots are only available through an In-App Purchase. The features that are listed below are all included in the regular purchase of the app. Major features of Scientific Calculator++ are: - Shows the expression as you enter and keeps a history of your calculations. - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization. - Quadratic and system of two linear equations solver. - Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers) - Common physical constants can be chosen from a list and used in the calculations. - Throws a set of dice (choice of 1 die to 4 dice) - Backspace to delete last digit entered. - Sinusoidal functions can be calculated for angles in units of degrees, radians, or gradians. - Showing the content of memory on MR button, as long as it fits. You are going to love the simplicity of the user interface and yet have the powerful functionality with which Scientific Calculator++ is loaded. Please do not hesitate to contact us for any questions, comments, to report any bugs, or to suggest additional functions you would like to see in the upcoming updates. Visit our website www.dogahe.com for other product descriptions.
SwiftRPN
This utility app provides a powerful Reverse Polish Notation (RPN) calculator with advanced features. It supports scalar types, vectors, and matrices, along with extensive built-in operators and unit conversions. Easily switch between number bases and visualize results.
- RPN stack for efficient calculations
- Support for scalar, vector, and matrix types
- 84 built-in operators with documentation
- 74 built-in units for conversion
- Multiple number base input and output (binary, octal, decimal, hex)
- BigInt support for integer calculations
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SwiftRPN is an RPN (Reverse Polish Notation) calculator that aims to be quick to open and easy to use. = RPN Stack Work quickly and efficiently using the RPN Stack by pushing and popping values. The stack will always show what series of inputs led to each output, so you won't lose context during complicated expressions. = Extended Types SwiftRPN can understand scalar types like integers and real numbers, as well as vectors and square matrices of sizes 2, 3, and 4. When operating purely in the scalar integer domain, SwiftRPN can promote up to BigInts to avoid floating point imprecision. = Operators SwiftRPN has 84 built-in operators with included documentation and examples. All the expected operators (basic arithmetic, exponents, logarithms) are present, as are: - Rounding functions (floor/ceil/trunc/round) - Unit conversions - Bitwise operations (and/or/not/xor/shift left/shift right) - Statistics (avg/min/max/sum/std dev/NPV) - Trigonometry (sin/cos/tan + arc/hyperbolic variants) - Vector operations (dot/cross/normalize/length/swizzle) - Matrix operations (identity/inverse/transpose + translation/scale/rotation matrix generators) = Unit Conversions SwiftRPN has 74 built-in units, and can convert between units within families, including: - Angle - Area - Colors (3 and 4 components) - Coordinate systems (2D and 3D) - Length - Mass - Storage (Base 10 [SI, 1000 bytes in a kb] and Base 2 [1024 bytes in a kb]) - Temperature - Time - Volume = Value Representation SwiftRPN recognizes values represented in binary, octal, decimal, and hexidecimal. You can: - Enter values in one representation, and convert them to another - See the result of bitwise operations in binary automatically - View vec3 and vec4 components (truncated) in hexidecimal when working with colors.
Screenshots
Verdict
The clearest difference is price: SwiftRPN at Free against Scientific Calculator++'s $2.99. SwiftRPN also leads on in-app purchases (none vs 2) and update cadence (every 14 months vs every 38 months). Scientific Calculator++'s advantage is ratings volume (21 vs 1) and iOS requirement (13.0 vs 17.6). On rating, ads 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
SwiftRPN is free to download; Scientific Calculator++ costs $2.99 up front. Scientific Calculator++ sells 2 one-off in-app purchases. SwiftRPN asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Scientific Calculator++ against 5.0 for SwiftRPN. That said, the two scores are not equally well evidenced: Scientific Calculator++ has 21 ratings behind it against 1, so its average is the more settled of the two.
Scientific Calculator++ ships an update every 38 months, SwiftRPN every 14 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.
| Parameter | Scientific Calculator++ | SwiftRPN |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (21 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 21 — better | 1 |
| Update frequency | Every 38 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Dogahe | Patrick Gelvin |
Customer experience
Scientific Calculator++
SwiftRPN
In-app purchases
Scientific Calculator++
- List Size Plus$0.99
- Quadratic Plus$0.99
SwiftRPN
No in-app purchases









