SofaBrain is an AI-based interior design application designed to help users visualize and transform living spaces such as living rooms, kitchens, and bedrooms effortlessly. Users can upload images of their spaces and choose from over 40 design styles. The app allows for customization of various elements such as furniture, paint colors, rugs, and accessories. It supports both professionals and DIY enthusiasts by providing realistic visualizations and saving time and money on design projects.