Message is a bit old, but if it interests some people, I recommend this game: Bash Your Lord.
It doesn't require to buy cards (which was the reason why i didn't like hearthstone) so I think it relies less on in-app purchases than other card games.
OP post is more than a year ago. Wonder if they ever found their way.
Anyway, the search function on this site has gone downhill imo (at least on my iPhone it just searched the whole site and gives you any and all related junk no matter what), which I'd usually say OP or anyone interested should use, so here's a link I was able to dig up from Google search.