My Sony Clie (PDA) had this capability of grouping contacts by category, which made it much easier to find a specific contact. For example, if I needed to lookup a specific restaurant and could not remember the name, I would simply go to the restaurant category and be able to see only the restaurants listings. Very handy when you have over 100 total contacts.
But now, with the capability of group emails, texting, etc., this app is absolutely priceless. And yet its free!!!
VERY WELL DONE, and THANK YOU!
I Am Catmom about Super Grouper for Contacts App Groups and List Management