This is my suggestion to Simple Contacts by Simple Mobile Tools.
Components
Simple Contact by Simple Mobile Tools is an open source application with a simple app for creating or managing your contacts from any source. The contacts can be stored on your device only, but also synchronized via Google or other accounts.
You can use it for managing user emails and events too. It has the ability to sort or filter by multiple parameters, optionally display surname as the as the first name. Over 500 users downloaded this application.
Proposal
I'm suggesting for this application to have a group feature. The group feature will be categorize according to family, friends and colleagues and the users can add more whatever they like.
Mockups / Examples
The photos below are the features of Simple Contacts.
The photo below is the edited version wherein group feature is added.
Benefits
The importance of having a group feature is that the users contacts will be organize and will be sorted according to where they categorize. For example, my Mother, sister and brother I put it in Family category since they're my family and Ate Barbs, Jhairah and Cristian belongs to Friend category since they're my friends in school.
Conclusion
This application is very helpful and useful to anyone especially to the ones who likes they're things to be will organize. It will also make the application updated.
Posted on Utopian.io - Rewarding Open Source Contributors