It works. It does what it can.

The app does what it can really well. It cleaned up a ton of my duplicate contacts, saving me hours of slogging through on my own.

It worked flawlessly for me, cleaning up some of the data in my contact records and reducing the number from about 1,200 to about 800. I like a lot of the interface elements, like the way it groups contacts by type of problem (and the ability to collapse the group), the radio buttons for resolution, and the checkbox that allows you to apply the selected fix to all the contacts with the sale problem.

Here’s what it won’t do (and probably shouldn’t!): it won’t reconcile duplicate contacts you have on different Internet accounts. For example, I have contacts in my iCloud, Exchange, and two different Google accounts. I still have duplicate contacts after using the app—but only because I have the same contact in iCloud and in Exchange, for example.

It felt a little too helpful, identifying “problems” like blank fields (Nicknames, Notes) and bad phone number formatting (213-555-1212 vs (213) 555-1212). But I just ignored those problems.

I recommend this app!

mikebannan about Contacts Cleaner