The old version of Messenger IPA, specifically version 1.0 to 10.0, was widely used in the early 2010s. This version had a simple and intuitive interface that made it easy for users to navigate and communicate with their friends. The app featured a list of conversations, a compose button to start new chats, and basic message editing options. The old version also included a distinctive blue and white color scheme that became synonymous with the Messenger brand.