The introduction of iOS 7 at the WWDC 2013 keynote, marked one of the biggest changes to the platform since its introduction in 2007. Apple replaced their familiar skeuomorphic icons with newer ones which are brighter and flattened. However not everyone will enjoy Apple's new choice in icons which sometimes looks plain and unfinished when compared to the rich detail in the older icons.
Check the following comparison of the iOS 6 vs. iOS 7 icons and let us know what you think
source