I have been trying several times to install Hearthstone via Amazon app store on stock Samsung Note 4, but they all failed with error message:"There was an error while installing Hearthstone: Heroes of Warcraft. Please try again." So there isn't any useful information there.
The reason I want to install via Amazon is that I want to buy packs at a discount. More information on this can be found in these links http://www.amazon.com/b?node=10558189011 and http://www.trumpfans.com/how-to-purchase-hearthstone-packs-at-a-discount-through-amazon/.
The Note 4 is the only android device I have. It is from Verizon and I don't have root access.