I'm new to AR. But I have a general idea of what I want to do. 

I want to overlay UI elements in Android on top of the camera input. 

These UI elements will be updated in real time, according to gyroscope, gps inputs, via bluetooth, wifi, etc. 

Something like Yelp's AR app, but the UI element values are updated much more frequently. 

Do I need Vuforia or Unity for something like this? Or Android will be good enough? 

What would be the fastest way? 

What would be the recommended way? 

Thanks.