Know anything about APK's? [View all]

I just moved to Directv Stream because satellite prices have gone through the roof. I can save $100 a month by migrating to streaming.
Here is the issue...I use Nvidia Shields as my streaming boxes because they are head and shoulders the best boxes one can purchase. Directv, however, does not support them, even though they say they do. I know...I asked explicitly before I decided to make this move.

I have researched this thoroughly and it seems you can download an APK and make the Shields work with Directv Streaming, but for the life of me, I can't get it to work.

Does anyone have any experience with using APK's on your streaming service?

* btw, before I found out that Directv does not support Nvidia Shield or Fire Sticks, I spent an hour on the phone with customer service, expert team, to figure out the problem...they NEVER told me that it was not supported, but instead gave me a workaround that lasted about 10 mins, then reverted to the original problem.