Usually call lock covers our entire call screen and people know that incoming call is locked.
Now you can lock your incoming calls with a invisible call lock and can unlock it by applying gestures you have already set.
you can create your own custom gesture rather than predefined gestures.
it many functionality like accepting call after unlock or disconnect call if number of attempts greater that you have set.
1)Define your own Gesture to unlock Call.
2)Can set multiple gesture to unlock call.
3)Lock All Incoming Calls or Particular Contact incoming call.
4)Set Visibility of Gesture over call screen.
5)Accept call automatically after unlocking.
6)End call automatically if number of try more than allowed attempts.
7)Lock particular contacts by clicking contacts button.
8)For unlocking call draw the gesture over call screen.