Contacts Plus is one of the world leaders in maintaining your Contacts Book. Once you install Contacts+ all your contacts from your phone book are automatically imported into the app. When you have more than one telephone no. per contact, it also allows you to set the default telephone no.
With Contacts+ apart from using your phone for calls and SMS, you can open Whatsapp, Viber, Hangouts, Email and more, directly from your contact list. So you can operate all these apps from one single interface without jumping from one to the other.
Birthday Reminders are also built-in. So, every morning, you get a message showing Birthdays of your friends in the Contact List
The free version handles all the above effortlessly. The paid version further gives you extended backup options, has an efficient duplicate finder, a spam blocker and gives you 80+ customizable themes to make it look exactly the way you want it to be!
An excellent tool for daily use.