Can you actually fly it that way? I do not see any problem to install DJI Go on my ST16S. Play Store shows DJI GO 4 app and let me to install it warning only that it may not be fully compatible. However without using sticks and other buttons on ST16S to control a DJI drone this will be just a very bulky screen. However and if all these buttons can be reprogrammed to control a DJI drone or work without any reprogramming that will be very cool.
Sorry I know this thread is old but I hope CAPTAINDRONE is still reading this forum.
I have just bought Mavic pro for my personal use and some indoor commercial use and realised that I need to spend some money(at least $200) on powerfull phone/tablet. I have a H520 and I'd rather spend it on an extra ST16/ST16S if I can get full control for Mavic pro from it.