# Wavelength Calculator vs Wavelet Voice Sonogram

The clearest difference is update cadence: Wavelet Voice Sonogram at every 8 months against Wavelength Calculator's every 30 months. Wavelength Calculator's advantage is price ($2.99 vs $6.99) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Wavelength Calculator costs $2.99 and Wavelet Voice Sonogram $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Wavelength Calculator ships an update every 30 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Wavelength Calculator | Wavelet Voice Sonogram |
| --- | --- | --- |
| Price | **$2.99** | $6.99 |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/wavelength-calculator/id1413070800/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 8 months** |
| Monetization | Paid | — |
| Size | 1 MB | 0 MB |
| Requires iOS | **13** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Wavelength Calculator

[App page](https://appshunter.io/ios/app/wavelength-calculator/id1413070800)

This physics and math tool quickly calculates wave properties like wavelength and frequency. It supports various units, high precision, and allows results to be copied to other applications. The app is lightweight, ad-free, and designed with privacy in mind.

**Highlights:** Instant calculations, Copyable results, Included formulas, High precision (16 decimal places), Multiple unit support, Ad-free and private

**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 Wavelength Calculator free?

Wavelength Calculator costs $2.99, with no in-app purchases.

### Is Wavelet Voice Sonogram free?

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

### Do Wavelength Calculator or Wavelet Voice Sonogram have ads?

Neither Wavelength Calculator nor Wavelet Voice Sonogram shows ads.

### Which is updated more often, Wavelength Calculator or Wavelet Voice Sonogram?

Wavelength Calculator ships an update every 30 months, and Wavelet Voice Sonogram every 8 months. Most recently, Wavelength Calculator was updated on October 8, 2026 and Wavelet Voice Sonogram on October 25, 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.*