SmartSync is a free app that syncs your iOS phonebook with your Facebook friendlist. The app needs to be granted permission to access your Facebook profile after which it scans your phonebook and Facebook friend list to find matching contacts. Once the scan is complete, it shows matching results — you can then change or remove any incorrect matches. The app takes a few minutes to download the contact images and profile information such as birthday, status updates and so on — and then syncs it with your iPhone's phonebook. It updates the incoming caller image with the contact images from Facebook. It can also be set to display a contact's latest status update along with the caller image when he/she calls you.
