Couchgram, For Your Calls Only

Couchgram, For Your Calls Only - Want to make your smartphone completely private? Now it's just, with this app you can set a lock on anything. Manage it quite simple, all you have to do is ask desired function. You can set a separate lock screen when calling, as well as to hide the name and number of who is calling, so until you unlock a smartphone, no one can answer it.