Contacts Backup is the easiest way to backup and restore your contacts all from your phone without needing a computer or synchronization. You can backup all your contacts with a single touch and send it to yourself as a .vcf attachment via email.

-Offline Backup. No need to sync to any server. Just email the backup file to yourself.
-One Tap to backup all your contacts and mail it to yourself .
-You don't need an iCloud account to backup and transfer contacts.
-You don't need a computer to backup your contacts.
-Backup all your important contacts in a second.
-Restore backed up contacts in One Tap from your mail.

You don't need a computer to backup your contacts !