# 2 Field % Calc vs SwiftRPN

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.

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.

## The numbers

| Metric | 2 Field % Calc | SwiftRPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/2-field-calc/id454060465/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 14 months** |
| Monetization | Free | Free |
| Size | 1 MB | 3 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Toshihiro Nakane](https://appshunter.io/developer/6799290769) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### 2 Field % Calc

[App page](https://appshunter.io/ios/app/2-field-calc/id454060465)

Calculate percentages between two numbers for various uses, including resizing images and determining magnification. Ideal for DTP and web designers needing quick calculations.

**Highlights:** Calculate percent between two numbers, Image resizing by percentage, Magnification calculation, Useful for DTP and web designers

**Features:** macOS Compatibility

**In-app purchases:** none


### SwiftRPN

[App page](https://appshunter.io/ios/app/swiftrpn/id6470951024)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is 2 Field % Calc free?

2 Field % Calc is free to download, with no in-app purchases.

### Is SwiftRPN free?

SwiftRPN is free to download, with no in-app purchases.

### Which has better reviews, 2 Field % Calc or SwiftRPN?

SwiftRPN is rated higher. 2 Field % Calc averages 4.0 out of 5 from 1 ratings, while SwiftRPN averages 5.0 from 1 ratings.

### Do 2 Field % Calc or SwiftRPN have ads?

Neither 2 Field % Calc nor SwiftRPN shows ads.

### Which is updated more often, 2 Field % Calc or SwiftRPN?

2 Field % Calc ships an update every 30 months, and SwiftRPN every 14 months. Most recently, 2 Field % Calc was updated on November 4, 2026 and SwiftRPN on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*