PHOTO SPEED DIAL

You can make a call by clicking on their photo.Marshmellowusers read description

In speed dial you can set a image and contact of a person and you can call them by clicking on their photo.This avoid the difficulties of remembering the number assigned to a contact.You can place the app in home screen and make call easy.

NOTE:For Marshmellow users you should go to settings and grant permission to access your contacts and photos to set to the button.