Catfiz is an Android messenger app with over 4 million users in more than 100 countries. It allows users to chat, share photos and files, send voice messages, broadcast messages, and hold conference calls. Some key features include user identification by number, status updates, themes, contact categories, and cloud file sharing of up to 30MB through Fizzlink. Users are encouraged to download the app from the website www.catfiz.com/download to experience these features.