[Shoomz]

I think the problem with this concept is your premise is based around functionality while your reasoning is based around purchasing. Frankly I almost never think about the app icon once purchased, it’s like reading names in books. I almost never know how to pronounce characters until I have to say them aloud, then for the life of me I have no idea how they sound. Case in point: (until the movie came out) how you pronounced “Hermione” (weird example I know). Back to the point, the icon itself gets it recognized for purchase…making it more harmonious with your app experience once downloaded is an ancillary benefit at best?

[baddox]

Regarding names in books, I find that I often learn to recognize names by the vague shape of the composing characters, and am unaware even of the exact spelling of the name.

[dllthomas]

If your users feel better about your app, they are more likely to tell others about your app. That's far more likely to get you found and purchased than popping slightly more than the next guy in the app store. That said, it's not clear just how big an impact a cleaner icon has, and the likelihood that your users will be talking about you in the first place probably depends on what your app does, &c. It does seem a good thing to keep in mind, though.