John,
I have a Samsung model SM-T810 which is about 3 years old. Me too, I hope the app works with it or it is cancellation. It opens the app, you see the train track, but then it goes to another white screen asking you to do a few things.
This is all I got yesterday. Extremely disappointed as I had a large monitor wired to the tablet. It would have been a crowd pleaser to watch the train loop around the layout at a public event we did.
I hope someone here or at Lionel reads this and replies.
Thanks,
Ted