App Store
Version 4.0.0 · 2024-08-06
Updates under the hood.
Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Not yet tested.
The store currently lists version 4.0.0, updated 2024-08-06.






Store screenshots supplied by the developer.
Notice: This Contains English Only Content. Spanish and German not included.
This application was originally designed at the University of Iowa to help students learning how the sounds of different languages are produced. Since its production, it has become a milestone for phonetics teaching tools around the globe.
Sounds of Speech™ provides a comprehensive understanding of how, physiologically, each of the speech sounds of American English is formed. It includes animations, videos, and audio samples that describe the essential features of each of the consonants and vowels of American English. Sounds of Speech™ is especially useful for students studying English as a second language. Features include:
From the developer’s store description.
For developers and the curious
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Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
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Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Updates under the hood.
sounds-of-speechWhat the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
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Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
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