Purchased one of these today as the price was too good to avoid:
https://www.amazon.com/Vizio-Remote-XR6 ... B07BMFHLDY
Upgraded to Android 6 (marshmallow)
Turned on App sideloading
Connected USB to a PC and changed mode to file transfer
copied the myUI_player.apk to the downloads folder of the tablet
Ran the installer from the tablet's file manager.
Opened the app
Ran Discovery which found myServer.
Chose the smartphone app (modern.phones)
Fast response, good display, and as good a touchscreen remote that can sit on the living room table charging on it's Qi wireless charge stand.