I’m one of the players who only play Hearthstone on mobile. There’s currently a big gap between mobile players and PC players who use third-party assistant tools. These tools help them track things like total board damage (both theirs and their opponent’s), cards in hand or deck, and more—without having to calculate anything themselves.
My suggestion is: why not bring some of these features to mobile as part of an official add-on? You could even offer it as a paid subscription—something like $3 or $6 a month. I believe many mobile players would be happy to subscribe to get access to features that help level the playing field.
I hope you find this suggestion helpful!