One part of the Google app you can get for the iPhone is the Google voice search. The main part of the app, other than to link you to all of Google’s programs is to search for things using your voice! You probably got that from Google Voice Search.
It looks great one their tutorial videos and could be great, but me being from London it doesn’t like my accent, or any one elses that I’ve asked if it’s worked. The only time it has was when a really awkward American accent was put on, and only then we only achieved one word. I downloaded an update that says it has improved the search for English accent and Australian. I hope for the Australians it has worked as it hasn’t for English.
The one thing about it I quite like is that it uses the accelerometer to know when you are lifting the phone to your head to say a search. Maybe try it out for that.
Even though it doesn’t really work for me, it would be interesting to see if it works for Americans and if they actually use it, instead of typing in their search. For now, and probably even if/when it does work I will probably just use the keyboard and search in the safari browser anyways.