Displaying an Android app above the tracked image

At the following URL, a dolphin is displayed on a tracked image.
Is it possible to replace the dolphin with an app on my phone?

How to use image tracking on Nreal Light? | NRSDK Developing Tutorial #3 - YouTube

Unfortunately in Android, the ability to run other apps inside your own app is reserved for system and privileged apps. Also reserved to the owner of the app to be called.

I understand. Thank you for your answer.