Presently your cell phone is the best way to stay connected with people because you do not have to search for contact details in different papers but you have all this in your phone. But not everyone who changes their contact details alerts you with the changes, so at that particular time it becomes difficult for you to get in touch with them. So, now you have an application named Perpetuall that will help you in keeping your phonebook updated when your contact change their contact details. You do not have to worry now about any changes when you are calling a person after a year’s time. This work will be already done by Perpetuall.