iSago

With iSago version 1.0 installed on your iPhone, you would be able to ask for a location of a restaurant in HoChiMinh city by saying keywords like "I want to eat Pizza in District 1" or "I want to find coffee-shops near Phu My Hung" etc. iSago could also works in offline mode by providing a text-based interface, incase that your iPhone can not access to the Internet. It is also important to notice that iSago is free to all iPhone-users.

Download here