Because it's strange and distracting? Is this a promotional app or an actual earth quake app?

Imagine this: Star Trek the next generation Earthquake Locator! and it's an Lcars interface.

Additionally Eva was a very divisive series. Popular yes, somewhat main stream in japan but also strange enough that its mostly liked by a certain crowd. I'm part of that crowd but at the same time I get why that crowd is different.

To help illustrate imagine 2010s Justin Beiber or Twilight themed earth quake apps. Right? That's sort of a different crowd from the people who like Eva and not everyone is into that stuff. Are you more likely to download the app if it was themed liked that?

Additionally Anime was not always mainstream in the world. It was considered nerdy to like it. It's become mainstream now in the last decade outside of japan, but in japan it's still considered a little different.