How to use augmented reality in mobile application?

either use vuforia or meta io SDK( vuforia ) is so nice sdk to use and work on the augmeted realiity app, wher you will be scannin the predefined images into ur project and scanning which will results in an overlay of other imageview.

i think its ?

Vuforia is an excellent cross platform library that enables to build native apps.

There is also a hybrid library wikitude which support phonegap