Is it possible to implement AR applications on mobile using Babylon? I have tried many technical approaches, but they all have limitations that prevent completion.
You can create mobile web AR applications through WebXR but in most of the world (the possible exception being the DMA region where Apple is forced to allow full non-Safari browser implementations versus thin UI facades over WebKit), they will not be able to run on iOS devices. I think you can create native AR apps that will run on Android and iOS using Babylon Native.
Feels like a duplicate, so here is my answer in the other thread - Exploring the Best Technology Stack for Mobile WebXR Development with BabylonJS - #3 by RaananW (and thanks @ericwood73 
)