Iceberg is an AI-powered tool designed for managing group chats on Apple devices. Available for download from the App Store, it can be used on iPhone, iPad, and iPod touch devices. The tool uses advanced AI to facilitate seamless and productive group discussions. The tool's core functionalities aren't specified in the provided text, but it can be inferred that the application may assist users in organizing, managing, and understanding the complexities of group chats better by employing AI. This could potentially include development of discussion threads, automated moderation or semantic analysis. Users are able to compare ratings and read reviews on the App Store before making the decision to download and use it. Furthermore, continuous updates and improvements are presumed based on standard app-development practices. However, for detailed usage and features, users should refer to descriptions and user-guides available in the App Store.