HAVOC is a proposed mobile chat app that allows users to join chatrooms ("channels") based on interests and includes features like private messaging, media sharing, and location-based functionality. It aims to combine aspects of popular apps like WhatsApp and WeChat. The proposal outlines the key features, design mockups, monetization strategy through ads and in-app purchases, estimated development costs of $8,500-$12,350, and issues to address such as app store registration and marketing.