The best alternatives to Magnus UI are Avocode, EpicPxls, and refine. If these 3 options don't work for you, we've listed a few more alternatives below.
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Save time on preparing design assets and specs and let Avocode do it for you. Just import any design file and invite developers to take everything they need for a Web, iOS, Android, or React Native app.
refine is a React-based framework for building data-intensive applications. It offers lots of out-of-the box functionality for rapid development, without compromising extreme customizability. It ships with Ant Design System, an enterprise-level UI toolkit.