I see it is now supporting GPS and compass for iOS Includes OpenGL ES2.x support, integration with GPS and compass, and automatic camera calibration utilities.. I know wikitude has supported POIs and retrieving POIs data. Does ARtoolkit have anything similar to this? If not, can I create my own POIs points and database? Would love to know how to get started for this..
ARToolkit is meant to do marker-based Augmented reality.
What you want for POI is location+orientation based Augmented reality, so no, ARToolkit does not have it.
To get started get a database of locations and just use a 3D Engine (probably Unity) to match the camera position in the world to your location and the rotation tot he rotation of the phone.