The following features are supported: * to keep multiple sets of address books in one iPhone or iPad * to bulk messages/emails * to organize templates of messages/emails * to add/remove groups * to add/remove group batch members * to transfer your address book from iPhone/iPad to another one directly without connecting internet or cloud * to add multiple address books from other iPhones/iPads to yours * to select any one of the received address books as your current local address book * to save your current address book locally and to restore it in case of need * to avoid erroneous deletion by protection mechanism * to make paper hardcopies of your address books by printing * no disclosure/hacking risk of internet and cloud because of peer/peer direct communication without internet * no risks of losing old contacts during transferring, old contacts would be remained or replaced by new one if their names are the same * to save your address book electronically via email, message or airdrop * to add new contacts * to modify existing contacts * to delete contacts in mass fashion * to set/view birthday reminder * to support advanced query (empty/non-empty/matching/containing/starting with/ending with) * to find/merge duplicates * to transfer individual contacts (sending via "Advanced Query”, receiving via "Import Address Book") * to enable/disable images when transferring individual contacts (via “Settings”) * to transfer individual address books (sending via "Organize Multi Address Books”, receiving via "Import Address Book") * to support simplified UI * no registration is required * no hassle of advertisement