Hi. You can try using these Apps for Contact Management:-
1. Inigo (http://inigoapp.com)
2. Flextown (https://flextown.com)
3. One Card (http://onecardme.com)
We are also developing a Contacts Management and Digital Visiting Cards App called InfinityKards (infinitykards.com). Using InfinityKards App you can find interesting people around you in a networking event and then share your digital visiting cards with them.
You can show your interest by registering on our website infinitykards.com. It will be an encouragement to us.
Founder, InfinityKards, 21st Century Business Cards.