Mr. Orange wrote:
So if I get a Samsung which has Google play, will I be able to sign in on EK with my current account and not have to pay 5$ to play?
Your wording isn't precise enough, or might not be, so to be 100% sure:
Have you already purchased EK with Google account? If yes, then you can use it on as many Android devices as you want, as long as all of them use that same account as main (or only one, there's bugs with account management, so sometimes Google can get confused with multiple accounts etc.).
If you bought EK on iOS, or PC, no, you'll need to purchase again.