Ratio S/Z by Marina Sauca (Universal)
Released: Apr 20, 2017
Version: 3.01
Size: 25 MB
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Ranking - Medical (iPhone)

Ranking - Medical (iPad)

Ratio S/Z

Marina Sauca
Ratio S/Z is an app designed by Andreu Sauca, an experienced speech therapist and phoniatrician. It has been conceived as a tool for the evaluation and the monitoring of voice rehabilitation.


The app registers the maximum expiration and phonation time and the calculation of the phonation quotient (or ratio S/Z) by using the highest of the three values in each.

The ratio S/Z test is a crucial part in every protocol of voice exploration. There might be different professional purposes for taking the test. In addition to the exploration purpose, the ratio S/Z can be used as a re-evaluation in case of being monitoring or before being discharged. In some cases, it can also be prescribed as a training for different objectives (this app can be used both by the speech therapist and by the patient) or as a screening tool to detect voice problems among some collectives such as teachers.


With the aid of the chronometers integrated in the ratio S/Z, the professional registers three samples of the highest time taken in the production of the [s] and other three samples on the highest time production of the [z]. Each chronometer shows the obtained values and highlights the highest one in blue. Automatically, the app uses these values to calculate the S/Z quotient, which appears in green or in red to indicate whether it is pathological or not. The interpretation of results varies according to some parameters (age and gender) is accessible through a specific button.

As the age and sex of the patient can vary the interpretation of the results, a button allows the selection of which kind of patient is undergoing the test. This will give us not only a more accurate result, but it will also evaluate the phonation time length, this is a novelty of this app.


-Careful design to enable an easy access and a right understanding of the results.
-Two chronometers with three partial storing boxes each individually resettable.
-Selection of the type of patient according to age and gender.
-Resounding examples of the requested sound.
-Color code to identify the result fields and buttons.
-Start, stop and reset buttons for each chronometer.
-Informative window about the test.
-Help window to ease the interpretation of results, adapted to it.
-Export your results to pdf.
-Languages: Spanish, Catalan, Italian and English. More soon.

What's new in version 3.01
We have a new and fresh look!
Also, you can now export the results to pdf and share it from the app.
The app has been rewritten from scratch, it's now better, faster and stronger!
Italian is now available as a language.
A small bug in the pdf generation has been fixed.
Screenshot #1 (iPhone)
Our verdict: Meh!
  • = Ratio S/Z has no ratings yet.
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