Default Whisper push

What is this, I did some research and it is now part of CM11, I would like to use this, but I don't see any texting app to work with this.

I registered the app but doesn't lead anywhere.

Any help would be appreciated.

Sent from my Inspire 4G using xda app-developers app

ROM [ROM][4.4.4][Mokee][Desire HD] MK44 UNOFFICIAL By, Ruling
Kernel: ROM Base Kernel
Revovery: 4Ext RC3

Retired Phones:
HTC Inspire 4G (semi-retired)
HTC Aria
Motorola Razor
Nokia 6010