# Vowel Practice vs Wavelet Voice Sonogram

The clearest difference is update cadence: Vowel Practice at every 4 months against Wavelet Voice Sonogram's every 8 months. Vowel Practice also leads on device support (3 vs 1). Wavelet Voice Sonogram's advantage is price ($6.99 vs $7.99). On ads, in-app purchases and iOS requirement there is nothing between them.

Vowel Practice costs $7.99 and Wavelet Voice Sonogram $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Vowel Practice ships an update every 4 months, Wavelet Voice Sonogram every 8 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Vowel Practice | Wavelet Voice Sonogram |
| --- | --- | --- |
| Price | $7.99 | **$6.99** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/vowel-practice/id799183655/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Monetization | Paid | — |
| Size | 1 MB | 0 MB |
| Requires iOS | **26.0** | 26.2 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [William Entriken](https://appshunter.io/developer/558586671) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Vowel Practice

[App page](https://appshunter.io/ios/app/vowel-practice/id799183655)

Analyze spoken vowels by calculating and plotting their formant frequencies. Speak a word with a single vowel to see its graphical representation on a standard vowel diagram, with an indicator light showing the application's status. Useful for speech therapy, language learning, and research.

**Highlights:** Calculates formant frequencies, Plots vowel locations on a diagram, Analyzes spoken vowels, Indicator light for status, Assists speech therapy, Supports language learning

**Features:** 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 Vowel Practice free?

Vowel Practice costs $7.99, with no in-app purchases.

### Is Wavelet Voice Sonogram free?

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

### Do Vowel Practice or Wavelet Voice Sonogram have ads?

Neither Vowel Practice nor Wavelet Voice Sonogram shows ads.

### Which is updated more often, Vowel Practice or Wavelet Voice Sonogram?

Vowel Practice ships an update every 4 months, and Wavelet Voice Sonogram every 8 months. Most recently, Vowel Practice was updated on November 6, 2026 and Wavelet Voice Sonogram on November 7, 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.*