The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From EZ Mobile Apps:
Organize and utilize your local address book / contacts more efficiently using this app.How ???!!!You can create/delete groups in your native contacts list of your iOS device, and move/exchange contacts from/ to the groups.This is not all; other features are given below.1. User friendly interface for deleting multiple contacts.2. Save or archive selected contacts to vCard files. 3. Send selected contacts as mail attachment in vCard format.4. Restore the saved/ archived vCards to your native address book.5. iTunes file sharing enabled. take out your saved/archived vCard files using iTunes. or add an external vCard file to the iTunes shared folder, which can be restored to the native address book.