We recently looked at Nokia’s double tap to awake and on-screen clock, features that are coming to the Lumia 920 (PR2.0). But what if you happen to be using a Windows Phone from HTC, Samsung or other Lumia phones? An app is available on the Windows Phone Store that emulates the on-screen clock and while it's not the full solution, it's a cool effect to see how the clock looks.

Here's our exclusive video of Nokia's double tap and on-screen clock:


The app emulates the above features, but instead of double tap to wake the device, the gesture will close the app and return the user to the app list. It's basic in functionality but gets the job done and provides a rather cool experience. You can download Nokia Lockscreen from the Windows Phone Storefor free (both Windows Phone 7.x and 8). Thanks, Ahmad, for the tip!


Reference:
http://www.wpcentral.com/try-out-nokia-lum...y-windows-phone

just emulator ..not real apps yet

it just a emulator to preview new features of upcoming updates