Whatsapp is a very popular app in the Netherlands. I use it as well as it's a very easy way to stay in touch with friends and family. Despite it's popularity it took some time to release an update for iOS7. Because of that I decided to redesign it with the goal of improving the user experience and aesthetics.
For the visual design I stepped away from the default iOS style that Whatsapp has always used in the past. I think the reason behind the default look is the native look and feel. But designing a native look and feeling is no fun so I designed something that you wouldn't expect from Whatsapp.
My redesign is not associated with Whatsapp and has been designed for fun.