If you're sick of duplicates and clutter in your iOS contacts then Contacts Duster Pro will help you clean them all up on your iPhone, iPad or iPod touch. Please note that this app is free for a limited time, so if it interests you then you should download it ASAP.
Personally I hate dealing with duplicate contacts in iOS. It's a real pain in the neck, so I tend to appreciate anything that makes it easier and faster to get rid of them. Who wants to scroll through a bunch of duplicates over and over? Ugh!
Detect and merge duplicates
Ability to mark undetected duplicates for Auto Dusting
Detect duplicates inside the same contact (i.e. two identical phone numbers)
Clean zombies (imported emails not associated to any contacts) making us the best remove duplicate contacts app out there!
All changes are saved directly within your iPhone address book
In-app backup/restore functionality
Visualize your address book partition using pie graph
Contacts analysis and manual merge of duplicates
Localized in 12 different languages: Arabic, Spanish, Portuguese, Russian, Chinese, Japanese, Korean, German, Dutch, French, Italian and Swidish
Cloud backup of your contacts (requires in app purchase)
You have nothing to lose, so try it now!
Additional resources for Contacts Duster Pro for iOS