I am looking for app from the iphone that are similar to this android app:

https://play.google.com/store/apps/details?id=com.progimax.moto.free - it is a motorcycle throttle which u can rev it like a real one.

http://itunes.apple.com/us/app/ferrari-sound/id337622060?mt=8 - and this which I found yesterday is a ferrari engine which u can rev.

So please if anyone has any other similar to this help me out!