# Halcyon Calc vs SpicyRPN

The clearest difference is update cadence: Halcyon Calc at every 4 months against SpicyRPN's every 25 months. Halcyon Calc also leads on iOS requirement (16.6 vs 18.0). SpicyRPN's advantage is price ($1.99 vs $4.99). On ads, in-app purchases and device support there is nothing between them.

Halcyon Calc costs $4.99 and SpicyRPN $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Halcyon Calc ships an update every 4 months, SpicyRPN every 25 months. The most recent releases landed on October 31, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Halcyon Calc | SpicyRPN |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | **[4.9 (18 ratings)](https://appshunter.io/ios/app/halcyon-calc/id327064659/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 25 months |
| Monetization | Paid | — |
| Size | 10 MB | 16 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [Bryan Davies](https://appshunter.io/developer/1474140611) |

## What reviewers say

### Halcyon Calc

[App page](https://appshunter.io/ios/app/halcyon-calc/id327064659)

A powerful calculator app for students, engineers, and scientists. It handles complex numbers, symbolic expressions, unit conversions, and matrix operations, with advanced plotting and programming capabilities.

**Highlights:** Complex number calculations, Symbolic expression manipulation, Unit conversion with custom units, Matrix and vector operations, Symbolic plotting, Programming of custom operations, Statistical data analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SpicyRPN

[App page](https://appshunter.io/ios/app/spicyrpn/id1474140612)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Halcyon Calc free?

Halcyon Calc costs $4.99, with no in-app purchases.

### Is SpicyRPN free?

SpicyRPN costs $1.99, with no in-app purchases.

### Do Halcyon Calc or SpicyRPN have ads?

Neither Halcyon Calc nor SpicyRPN shows ads.

### Which is updated more often, Halcyon Calc or SpicyRPN?

Halcyon Calc ships an update every 4 months, and SpicyRPN every 25 months. Most recently, Halcyon Calc was updated on October 31, 2026 and SpicyRPN on October 22, 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.*