Sparklefish
Sparklefish is a free app available on iTunes. It allows students to record parts of speech in their own voices in order to complete pre-recorded stories. It is very much like an interactive, audio version of Mad-Libs, which kids love because it is silly and fun. It is also good for practicing parts of speech, such as adverbs, nouns, etc. This app would also be helpful for students who have problems with pronounciation and enunciation.
https://itunes.apple.com/us/app/sparklefish/id432462341?mt=8