What is the free AI app everyone is using?

I'm curious, what is this so-called "free AI app" that seems to be generating quite a buzz these days? I'm hearing a lot about it from my friends and colleagues in the tech industry, but I haven't had the chance to check it out myself yet. Is it a new and innovative tool that's making life easier for people in some way? Or is it just another fad that will fade away soon? I'm eager to learn more about it and understand what sets it apart from other AI-powered apps on the market. Can you enlighten me on the specifics of this app and why it's capturing the attention of so many people?