It doesn't make much sense to give this game a date, as I played it last year and it won me back again this year. Just perfect because of the way it's structured:

-easy to remember EVERY SINGLE card, so you never have that "wait, what happened?" moment. If you lose, you know why.
-always nice that you get more cards by improving your cards (Heartstone should learn...).
-perfect for any moment. In the bathroom? Snap! At work (on break or even while pretending to work)? Snap! While you have to wait for the bus? SNAP!

Simply THE phone game at the moment for me!