https://itunes.apple.com/us/app/smalltalk-phonemes/id384170714?mt=8
– SmallTalk – phonemes/Lingraphica
The SmallTalk Phonemes app provides a series of
speech-exercise videos, each illustrating the tongue and lip movements
necessary to produce each of the phonemes in the English language.
Source: Project Read Free Apps to Enhance Instruction by the San Francisco Public Library