2 Field % Calc vs SwiftRPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
2 Field % Calc
Calculate percentages between two numbers for various uses, including resizing images and determining magnification. Ideal for DTP and web designers needing quick calculations.
- Calculate percent between two numbers
- Image resizing by percentage
- Magnification calculation
- Useful for DTP and web designers
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Calculation of percent for two numbers. Simply you input number and Dial Percent. We are using this app for resizing image with percent. Especially for resizing to different size of image. For DTP and Web designer ! Also you can calculate magnification. ( B/A = How much bigger is it ? ) We hope that this app helps your work. Thank you!! And there is "Aspect Ratio C Calc" App. Please visit our site: http://www.4us.jp We made other apps.
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 rating: SwiftRPN at 5.0 against 2 Field % Calc's 4.0. SwiftRPN also leads on update cadence (every 14 months vs every 30 months). 2 Field % Calc's advantage is iOS requirement (15.6 vs 17.6). On price, ratings volume, ads and in-app purchases 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.
SwiftRPN holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
2 Field % Calc ships an update every 30 months, SwiftRPN every 14 months. The most recent releases landed on November 4, 2026 and November 7, 2026 respectively.
| Parameter | 2 Field % Calc | SwiftRPN |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 30 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Toshihiro Nakane | Patrick Gelvin |
Customer experience
2 Field % Calc
SwiftRPN
In-app purchases
2 Field % Calc
No in-app purchases
SwiftRPN
No in-app purchases









