Question: Can you recommend a tool that enables visual UI design and custom logic for building unique apps?

If you're looking for a tool that combines a visual UI design with the ability to add custom logic for creating apps that stand out, Nowa is a powerful contender. It offers a visual design interface for creating high-quality mobile, web and desktop apps, but also lets you add custom logic and programming. You can connect to various backends like Firebase, Supabase and Airtable without having to write any code. It also offers responsive design, one-click multi-platform export, hot reload and collaboration tools.

Another top contender is FlutterFlow. This web-based tool lets you create modern apps with Firebase integration, API support and animations through a visual drag-and-drop interface. It comes with more than 80 Flutter widgets and 170 pre-built components, so you can customize it to your heart's content. FlutterFlow also offers real-time collaboration, a custom code editor and the ability to publish to app stores and custom domains.

Noodl is an open-source, AI-augmented low-code foundation for rapid development of full-stack custom apps. With visual development, customization and reusable modules, Noodl is good for people with some or no experience. It connects to third-party services, offers real-time data flows and scales with built-in backend and user management. The company also has a strong community for help and resources.

If you want a no-code option, Bubble could be the best fit. It lets you create, design, test and deploy production-ready apps with no programming skills. Bubble offers hundreds of templates, a drag-and-drop editor and AI-generated pages. With scalable and secure hosting, collaboration tools and a range of pricing plans, it's good for startups and enterprise-scale projects.