Contact Analyzer (Address Book CleanUp)
Contact Analyzer helps you clean up your address book by pointing out issues and missing data.
Run it once in a while for a perfect address book.
Features:
✓ The analyzer looks for duplicates / conflicts, missing first names, last names, phone numbers, emails, work details, addresses, pictures and birthdays
✓ Merge and edit contacts
✓ Optimized for Retina display
✓ Supports multitasking in iOS 4 (app switching)