DamonPS2 on Nvidia Shield

Hi,

I recently purchased an NVIDIA Shield and i'm having some fun with it. I have been using Retroarch as an emulator for some old games and it works well. I have been reading about PS2 emulation and it seems an app named DamonPS2 is used by many people successfully. The problem is, this app is not on Shield's Play Store app. It is however on my Samsung S8's app so i have purchased it. Any suggestions how i can get the app legally onto the Shield?

I have tried taking the .apk off my phone and installing it manually onto the Shield - but the when the app opens up on the TV it tells me it won't work - obviously some kind of protection or something.

So annoying how the Play Store from my Mac's chrome browser won't let me install DamonPS2 to the Shield directly! It says it is not compatible.

Any ideas?