# Codex Calc vs SwiftRPN

The clearest difference is price: SwiftRPN at Free against Codex Calc's $0.99. SwiftRPN also leads on rating (5.0 vs 4.0). Codex Calc's advantage is update cadence (every 6 months vs every 14 months) and iOS requirement (12.0 vs 17.6). On ratings volume, ads, in-app purchases and device support there is nothing between them.

SwiftRPN is free to download; Codex Calc costs $0.99 up front. 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.

Codex Calc ships an update every 6 months, SwiftRPN every 14 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Codex Calc | SwiftRPN |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/codex-calc/id505057155/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 6 months** | Every 14 months |
| Monetization | Paid | **Free** |
| Size | 11 MB | 3 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Driftwood Studio Software LLC](https://appshunter.io/developer/1822849713) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### Codex Calc

[App page](https://appshunter.io/ios/app/codex-calc/id505057155)

This app offers a powerful yet intuitive calculator experience with a variety of modes including scientific, unit conversion, and tip calculation. It features a customizable interface and a detailed history tape for all your calculations.

**Highlights:** Full scientific calculator functions, Unit converter, Tip calculator, RPN mode, History tape, Customizable interface, Multiple visual themes

**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 Codex Calc free?

Codex Calc costs $0.99, with no in-app purchases.

### Is SwiftRPN free?

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

### Which has better reviews, Codex Calc or SwiftRPN?

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

### Do Codex Calc or SwiftRPN have ads?

Neither Codex Calc nor SwiftRPN shows ads.

### Which is updated more often, Codex Calc or SwiftRPN?

Codex Calc ships an update every 6 months, and SwiftRPN every 14 months. Most recently, Codex Calc was updated on November 1, 2026 and SwiftRPN on November 3, 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.*