# Halcyon Calc Lite vs SwiftRPN

The clearest difference is in-app purchases: SwiftRPN at none against Halcyon Calc Lite's 3. SwiftRPN also leads on ads (none vs shown) and rating (5.0 vs 4.6). Halcyon Calc Lite's advantage is update cadence (every 3 months vs every 14 months) and ratings volume (15 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Halcyon Calc Lite sells 3 one-off in-app purchases. SwiftRPN asks for nothing beyond the download.

SwiftRPN holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Halcyon Calc Lite has 15 ratings behind it against 1, so its average is the more settled of the two.

Halcyon Calc Lite ships an update every 3 months, SwiftRPN every 14 months. The most recent releases landed on October 31, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Halcyon Calc Lite | SwiftRPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (15 ratings)](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** |
| Number of ratings | **15** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 14 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 3 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [Patrick Gelvin](https://appshunter.io/developer/1573354051) |

## What reviewers say

### Halcyon Calc Lite

[App page](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888)

This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.

**Highlights:** Symbolic expression manipulation, Graphing of expressions, Matrix and vector calculations, Statistical analysis, Multiple number formats (decimal, hex, octal, binary), Over 225 built-in operations

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Directory And Unit Conversion Support | $0.99 | one-time |
| Programming Support | $1.99 | one-time |
| Larger Display Upgrade | $1.99 | one-time |


### 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 Halcyon Calc Lite free?

Halcyon Calc Lite is free to download, with in-app purchases available.

### Is SwiftRPN free?

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

### Which has better reviews, Halcyon Calc Lite or SwiftRPN?

SwiftRPN is rated higher. Halcyon Calc Lite averages 4.6 out of 5 from 15 ratings, while SwiftRPN averages 5.0 from 1 ratings.

### Do Halcyon Calc Lite or SwiftRPN have ads?

Halcyon Calc Lite shows ads; SwiftRPN does not.

### Which is updated more often, Halcyon Calc Lite or SwiftRPN?

Halcyon Calc Lite ships an update every 3 months, and SwiftRPN every 14 months. Most recently, Halcyon Calc Lite was updated on October 31, 2026 and SwiftRPN on October 27, 2026.

---

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