Voice Stability Test

Name: Voice Stability Test
Rating: 2.7 (3 reviews)
Author: Hyunmin Park

By: Hyunmin Park

Health & Fitness

Features & Capabilities

This test can check your voice quality by variations of frequency (Jitter).

Jitter and shimmer are measures of the cycle-to-cycle variations of frequency and amplitude, respectively, which have been largely used for the description of pathological voice quality.

Higher jitter levels suggest that something is interfering with normal vocal fold vibration and the mucosal wave.

Whereas jitter is a measure of the percentage irregularity in the pitch of the vocal note, shimmer is a measure of the percentage irregularity in the amplitude of the vocal note.

User Growth & Download Statistics

App

By:

Hyunmin Park

Rating:

2.70

(3) 2.70

Version:

1.0 Last updated: 2015-11-13

Version code:

841541249

Creation date:

2015-11-13

Compatible devices:

Size:

6.90MB

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 773,736 ▲ 362,308

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

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Developed by:

Hyunmin Park

Apple Apps Store

https://apps.apple.com/us/app/voice-stability-test/id1056651980

User Reviews

It takes a lot of ties to get your result and is not that easy

by Po*****, 2026-03-01

This app is easy to use and figure out. It tells you what to do for easy instruction. Also gives the results immediately

by 10*****, 2018-04-29

When it asks to say a vowel, should it be long or short? Why are you asking for name and age? What does "jitter" mean? show me a picture of jitter vs. no jitter. I can't analyze the spectral result so why display it? The help just labels the controls. There is no explanation of what this app is or does.