iMazing : Backup , Transfer & Clean Contact

This app is designed to clean up your address book.
*) This app allows you to add multiple contacts for cleanup.
*) For cleanup & merge duplicated contacts, this app will automatically sync
*) Easy and fast to bulk delete contacts in your accounts.
*) This app can quickly remove any duplication and useless contact information (such as empty contact name, no phone number, no content, repeated phone numbers and email addresses).