Search for a game. The set of games is displayed with an install link and a screenshot. The description needs some scrolling.
(Edit: bizarrely heavy downvoting in this thread)
The webpage for that 2048 references Threes, so even he is supporting a line of direct influence.
He was cloning 1024 which was explicitly a clone of Threes. I was only pointing out there was a chain there.
The innovation appears to have advanced enough that some of the 2048 variations are more akin "Doom clones" and "Roguelikes" than they are to "app store clones". But the 2048 apps that have flooded the app store and are mostly direct clones of the web 2048 versions. And they exist in a previously unnamed space between "clone" and "variation".