iSago 1.0 on Apple Store

With iSago installed on your device, you would be able to ask for locations of food courts and restaurants in Saigon just by saying something (Vietnamese only) like "I want to eat Pizza in District 1" or "I want to find coffee shops near Phu My Hung" etc. iSago will do the search task and fetch back suitable spots for you. iSago also works in offline mode by providing a text-based interface, in case your device can not access to the Internet.

iSago features: 
- Food courts and restaurants locating. 
- Speech-based user interactions. 
- Text-based user interactions. 
- Detailed info surfing. 
- User ratings & comments. 
- Promotion and trend feeds. 
- Content sharing via Facebook and email.

Link: 

https://itunes.apple.com/us/app/isago/id577706534?l=vi&ls=1&mt=8