WinPhone has the "problem"[1] of going down a rather different UI path vs. Apple and Google. You see this in a less extreme form on Android quite a bit, where a

WinPhone has the "problem"[1] of going down a rather different UI path vs. Apple and Google. You see this in a less extreme form on Android quite a bit, where apps will use (often badly-made) custom iOS-style widgets (the bottom nav bar, usually) that just don't fit in Android's patterns. WinPhone has even fewer patterns in common, thus when a dev tries to bring over iOS or Android patterns, it shows. [1] It's a "problem" as it's not what devs/users are used to working with, not a problem because of flawed design (FTR, I rather like it)