The evolution of Samsung's TouchWiz UI: From the Galaxy S to the Galaxy S5 (visual comparison)

The Samsung Galaxy S family. From left to right – Galaxy S, Galaxy SII, Galaxy SIII, Galaxy S4, and Galaxy S5.
Back in March 2010, almost five full years ago, Samsung announced its first Galaxy S line smartphone. Like a clockwork, the South Korean giant has been reiterating on its flagship vision annually since, and we're now on our way to witness the sixth consecutive refresh of the Galaxy S series at MWC 2015. For the time being, however, the Galaxy S5 is the company's top-of-the-line flagship (Note series notwithstanding), and we felt compelled to showcase the kind of changes Samsung's polarizing TouchWiz interface went through over the years.
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