VoiceViewer vs FormantScope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VoiceViewer
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实时音高、音频展示； 音高、音色评估； 历史评估记录查询；
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 iOS requirement: VoiceViewer at 15.0 against FormantScope's 17.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | VoiceViewer | FormantScope |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 晓亮 敬 | 跃然 王 |
In-app purchases
VoiceViewer
No in-app purchases
FormantScope
No in-app purchases
Questions
Is VoiceViewer free?
Is FormantScope free?
Do VoiceViewer or FormantScope have ads?
Other comparisons
