# ボイスバイタル

> ボイスバイタル (iPhone/iPad app by satoshi amasaki.)

- Source: https://appshunter.io/ios/app/id6772985032 (this page in markdown: same URL + `.md`)
- Developer: [satoshi amasaki](https://appshunter.io/developer/1891268722)
- Category: Health & Fitness
- Price: $0.29
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English, Japanese
- Released: 2026-05-26
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/id6772985032/reviews.md

## What is ボイスバイタル?

Analyze a 5-second sustained vowel to visualize health trends from subtle variations in vocal fold vibration.

Measures 6 acoustic parameters based on peer-reviewed research in speech pathology and psychoacoustics.

Parameters:
- F0 (Fundamental Frequency) [Titze 1994]
- Jitter — neuromuscular stability index [Baken & Orlikoff 2000]
- Shimmer — vocal fold symmetry and closure [Baken & Orlikoff 2000]
- HNR (Harmonics-to-Noise Ratio) [Yumoto et al. 1982]
- CPP (Cepstral Peak Prominence) [Hillenbrand et al. 1994]
- Alpha Ratio [Laukkanen et al. 1997]

Features:
- Instant analysis from 5 seconds of voice
- 3-axis scoring: Stress, Fatigue, Stability
- Daily trend charts
- Full parameter references

Not a medical device. Results are for reference only.


## Version history (last 1 release)

### 1.0 — 2026-05-26

No release notes.

## More apps by satoshi amasaki

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- [BodyReader](https://appshunter.io/ios/app/bodyreader/id6762313745)

All apps by satoshi amasaki: https://appshunter.io/developer/1891268722

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*