Google introduces Siri-like voice search
Google this week introduced a voice search function to its Google Search app for the iOS, which it claims is "the most advance." Simply tap on the microphone icon and speak your question, just like with Apple's Siri. The words show up on the screen as you speak, and the answer is spoken back or shown quickly.
The voice feature works on any iOS device running 4.3 or higher, but it's optimized for the iPhone 5. The app is free.