# Halcyon Calc vs my15c

The clearest difference is price: my15c at Free against Halcyon Calc's $4.99. my15c also leads on update cadence (every 2 days vs every 4 months). Halcyon Calc's advantage is in-app purchases (none vs 1) and iOS requirement (16.6 vs 26.0). On ads and device support there is nothing between them.

my15c is free to download; Halcyon Calc costs $4.99 up front. my15c sells 1 one-off in-app purchase. Halcyon Calc asks for nothing beyond the download.

Halcyon Calc ships an update every 4 months, my15c every 2 days. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Halcyon Calc | my15c |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 10 MB | 53 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [Miroslav Perovic](https://appshunter.io/developer/400748424) |

## 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


### my15c

[App page](https://appshunter.io/ios/app/my15c/id6796379580)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full App | $9.99 | one-time |


## Frequently asked questions

### Is Halcyon Calc free?

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

### Is my15c free?

my15c is free to download, with in-app purchases available.

### Do Halcyon Calc or my15c have ads?

Neither Halcyon Calc nor my15c shows ads.

### Which is updated more often, Halcyon Calc or my15c?

Halcyon Calc ships an update every 4 months, and my15c every 2 days. Most recently, Halcyon Calc was updated on September 22, 2026 and my15c on September 14, 2026.

---

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