Viber for iOS7
Try to redesign Viber for iOS7 :)
Inspiration : http://dribbble.com/shots/1118772-Twitter-iOS7
iOS UI : http://www.teehanlax.com/tools/ios7/
iPhone Mockup : http://dribbble.com/shots/988988-iPhone-5-PSD-Free-Template
And icons : http://www.iconarchive.com/show/ios7-icons-by-visualpharm.html