proceed with caution

This App can and will hose your contacts. The app justly warns you to back up your contacts before using, but if your Contacts are linked with other outside accounts (i.e. gmail) an OS X Contacts archive might not back up everying that Contact Cleaner is mucking around with. You could find yourself (like me) in a data loss situation which not easy to recover from. Not pleased.

Akz zka about Contacts Cleaner