For those who are interested in CMUSphinx on mobile, please check out the PolitePix blog where you could find some interesting ideas about pocketsphinx on iPhone:
OpenEars tips #1: create a language model before runtime from a text file or corpus
OpenEars tips #2: N-Best hypotheses with OpenEars
OpenEars tips #3: Acoustic model adaptation
OpenEars tips #4: Testing someone else’s recognition results using a recording
OpenEars is the easiest way to try open offline speech recognition on iPhone platform. If you are interested to add speech recognition to your iPhone application, you should definitely check it out.