Contact manager for iOS with tags?

Question

Mobile development

Requires a Service / iOS application that can do 3 things:
1. Synchronization with the phone's phone book
2. Supports tree tags
3. Allows you to link contacts by a common attribute
More.
I meet a new person and learn some information about him.
For example: Konstantin Antonov [phone], director of the furniture factory Omega
I open the application and drive in:
Surname - Antonov First
name - Konstantin
Phone: [phone]
Tags: #furniture, #director, #omega
Tags should be from auto substitution so that I don't have to enter the full tag name each time.
Yes, something similar can be done in the phone book. But there in the comments there is no auto tag substitution.
The program should be able to search by tags. For example: show contacts that are related to printing. Those. contacts whose tags contain #printing.
As a bonus, it would be nice to be able to import contacts from social networks.
PS I also like the integration with social networks in FullContact. You log in to the social network - and all the accounts from it are in your contacts ...

Answer 1

Need ready.