Update: Two more shots after the break.
The images above might be our first look at redesigned stock apps in Google’s upcoming Android 4.4 “KitKat” update. We’ve been reporting on a lot of Nexus 5 and Android 4.4 leaks since we first discovered an unannounced Nexus device in Google’s promotional video for the upcoming OS update. While images of the Nexus 5 have leaked several times– we posted exclusive photos and video of the device earlier this week– we have yet to get a good look at Android 4.4 KitKat. Today another source reached out with the photos above claiming to show redesigns of the phone dialer and messaging apps on KitKat.
The images show new lighter color, grey icons on the status bar, which lines up with our leaked video of the Nexus 5 and a screenshot for a Google Keyboard update spotted by AndroidPolice yesterday.
The images also appear to show a colored status bar that changes depending on the color scheme of the app.
We can’t see any new functionality, but the shots do show extremely streamlined redesigns for the phone app and messaging app on Android 4.4. Controls in the messaging app get bumped up to the top right hand corner, and the phone dialer gets a much cleaner, and flatter look with a new light blue color scheme.

Source: 9to5Google

Recent rumors point to an October release date for the Nexus 5, and if history is any indication,Google will also debut Android 4.4 alongside the new Nexus device.
Two more alleged KitKat shots from the same source below: