# Halcyon Calc vs Wavelet Voice Sonogram

The clearest difference is update cadence: Halcyon Calc at every 4 months against Wavelet Voice Sonogram's every 8 months. Halcyon Calc also leads on price ($4.99 vs $6.99) and iOS requirement (16.6 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

Halcyon Calc costs $4.99 and Wavelet Voice Sonogram $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Halcyon Calc ships an update every 4 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Halcyon Calc | Wavelet Voice Sonogram |
| --- | --- | --- |
| Price | **$4.99** | $6.99 |
| 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 8 months |
| Monetization | Paid | — |
| Size | 10 MB | 0 MB |
| Requires iOS | **16.6** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## 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


### Wavelet Voice Sonogram

[App page](https://appshunter.io/ios/app/wavelet-voice-sonogram/id1574131130)

**In-app purchases:** none


## Frequently asked questions

### Is Halcyon Calc free?

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

### Is Wavelet Voice Sonogram free?

Wavelet Voice Sonogram costs $6.99, with no in-app purchases.

### Do Halcyon Calc or Wavelet Voice Sonogram have ads?

Neither Halcyon Calc nor Wavelet Voice Sonogram shows ads.

### Which is updated more often, Halcyon Calc or Wavelet Voice Sonogram?

Halcyon Calc ships an update every 4 months, and Wavelet Voice Sonogram every 8 months. Most recently, Halcyon Calc was updated on November 6, 2026 and Wavelet Voice Sonogram 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.*