API for voice to text conversion.
I have looked over the internet for voice to text conversion APIs. 
CMUSphinx, Android inbuilt API (Level 3), and pygooglevoice exist. 

Which among them is the most accurate? 
(I am looking for an API to be used on a mobile platform). 

Thanks. 
API for voice to text conversion.
===

I have looked over the internet for voice to text conversion APIs. 
CMUSphinx, Android inbuilt API (Level 3), and pygooglevoice exist. 

Which among them is the most accurate? 
(I am looking for an API to be used on a mobile platform). 

Thanks. 