Groups is a free app for iOS that belongs to the category Productivity, and has been developed by Qbix, Inc.. It's recommended for small business, families, business users.
More about Groups
People say you should turn off imessage and group messaging before using.
If you like Groups you'll also enjoy: Connect - Contact Manager for iPhone, Group Text!, Text 2 Group Pro – Quickly send SMS messages, Groups: SMS, Mail and Manage Contacts, Touch™, KakaoTalk.