Device's contacts group editor for iPad.
Specialized for iOS7 and iPad, so simple and easy to use.
tapping new makes new group,
long pressing the group name makes the name change,
swiping the group name makes the group delete.
Better point from other group software, this app can make a group on an exchange account like gmail or outlook. (Only in the device)
If you looking for free version of this app, iPhone version is free. You can search by "Simple Group Editor".