Everytime I play Magic, I use life tracker in Companion app.
It's so neat and easy.
But sometimes I confused opponent's life when it's 6 or 9 because it's upside down for my sight.
So, my suggestion is simple.
First, when life is 6 or 9, underline the number so anyone can recognize a correct direction of number.
Second, add a option for verticalized view.
Mostly I put my phone beside the battlefield. I look at it sideaway.
If the life number is rotated vertically, I and my opponet feel comfortable.
The pictures are my sketch for suggestion.
I will be happy if you accept my opinion.
Thank you.