Contacts Master - batch manage is a free utility and tools app available for iPhone. Developed by 海洋 蒋, this app aims to handle your address book problems efficiently. With Contacts Master, you can easily delete mobile phone numbers in batch, block spam messages, and send group messages. The app also offers T9 dialing and speed dialing features, making it convenient to make calls.

Furthermore, Contacts Master allows you to backup and restore your address book, export contacts as VCard and excel, and import contacts in batch through Excel and vCard. The app also helps optimize your address book by clearing duplicate contacts and contacts with unknown names or numbers.

In addition, Contacts Master provides the option to add and delete country codes, solving the problem of dialing phones when out of the country. It also allows you to check the home of the mobile phone number and manage a private address book. With batch operations, you can easily add and delete prefixes, suffixes, and company information.

Overall, Contacts Master - batch manage is a comprehensive tool for managing your address book effectively and efficiently. It offers a range of features to simplify contact management and ensure a clutter-free address book.