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S/Z Ratio

By Meld Apps

This app is only available on the App Store for iOS devices.


S/Z Ratio is an evaluation utility for speech-language pathologists who provide assessment and/or treatment to clients with voice disorders.

With a built-in stopwatch feature, S/Z Ratio allows for the timing of a clientʼs /s/ and /z/ maximum phonation times. Once maximum phonation times are taken, an s/z ratio is instantly calculated. Calculated ratios are displayed in a color-coded fashion to provide visual feedback for quick interpretation of testing results. A reference information screen is also included to assist clinicians and clients in interpreting the obtained s/z ratio results.

Consider using this application throughout the evaluation and treatment process: (1) during initial evaluations, (2) as a screening tool to identify the need for further assessment, (3) during treatment sessions for visual, instant feedback, and (4) as a re-evaluation measure of progress based on therapeutic interventions.

Whether you specialize in voice therapy or provide treatment to the occasional client with voice disturbances, this application is a must-have. S/Z Ratio provides a wealth of features including:

- Built-in stopwatch
- Instant calculation of ratio
- Color-coded display of ratios
- Reference information screen for assistance in interpreting results
- Single touch Start, Stop and Reset stopwatch buttons
- Large, easy to read display
- Displays /s/ and /z/ maximum phonation time simultaneously for easy review and discussion with clients

Replace your stopwatch and calculator with this app today, and gain some much needed time and pocket space as a result!

What's New in Version 1.1

Universal update - Now runs natively on iPhone & iPad.
Added a global reset button to reset both /s/ and /z/ durations with a single tap.
Updated icon.


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S/Z Ratio
View in iTunes
This app is designed for both iPhone and iPad
  • 7.29 QAR
  • Category: Medical
  • Updated:
  • Version: 1.1
  • Size: 1.6 MB
  • Language: English
  • Developer:

Compatibility: Requires iOS 3.0 or later. Compatible with iPhone, iPad and iPod touch.

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