Vowel Practice vs FormantScope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vowel Practice
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.
- Calculates formant frequencies
- Plots vowel locations on a diagram
- Analyzes spoken vowels
- Indicator light for status
- Assists speech therapy
- Supports language learning
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This application calculates and plots the formant frequencies of spoken vowels. The user should speak a word containing a single vowel, and we will analyze and show results. First two formant frequencies are used to graphically show the location of spoken vowel on a standard vowel diagram. An indicator light changes its color to display the status of the application. This is made to assist with speech therapy and language learning as well as other research topics.
FormantScope
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FormantScope analyzes your voice in real time on device: it shows fundamental frequency (F0), the first and second formants (F1 and F2), and input level, with short history charts for practice and coaching. • Live numeric readouts for F0, F1, F2, and level • Dual-series charts with independent scales • Stability and gating to reduce flicker during continuous phonation • Optional WAV export to a folder you choose • iPhone, iPad, and Mac; microphone is used only for local analysis • No account required; open-source project (see support link) FormantScope does not send your microphone audio to the developer for processing. Optional recordings are saved only where you select on your device.
Screenshots
Verdict
The clearest difference is price: FormantScope at Free against Vowel Practice's $7.99. FormantScope also leads on update cadence (every 6 weeks vs every 4 months) and iOS requirement (17.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
FormantScope is free to download; Vowel Practice costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Vowel Practice ships an update every 4 months, FormantScope every 6 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Vowel Practice | FormantScope |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 18.2% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | William Entriken | 跃然 王 |
In-app purchases
Vowel Practice
No in-app purchases
FormantScope
No in-app purchases
Questions
Is Vowel Practice free?
Is FormantScope free?
Do Vowel Practice or FormantScope have ads?
Which is updated more often, Vowel Practice or FormantScope?
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