In the previous times everyone use to have an address book and a phone directory in which they use to write down manually all the details of their contacts either the cow workers, friends or the family members. Such system was quite successful without any doubt and was best suitable and compatible with the landline system. The landlines were in the houses and these address books and directories were also set aside them, whenever there was need to make a call or find the address of someone these things were accessed at that time. As the technology leaps forward and new modes of communication were introduced later on like the invention of cellular mobile phone and later the smartphones which are quite common nowadays, the use of these traditional directories almost wiped out totally. As now the people can store all the contacts details and information inside the phone book of their smartphones. Leaping more forward now there are numerous such apps being introduced in the market that automatically on their own manage the contacts of the users and make the accessing more quick and efficient. Best of contact apps are listed here.