This modern app design template showcases a minimalist aesthetic with a 3D cube as its focal point. The cube is set against a vibrant, rainbow-colored gradient that transitions smoothly from red to orange, yellow, green, and blue. The background is framed by a black border, adding depth and contrast to the overall design. The use of a simple, geometric shape like a cube allows for a clean and uncluttered visual representation, making it ideal for various app design concepts. The rainbow gradient adds a touch of creativity and playfulness, while the black frame grounds the design. This template can be adapted for different applications, from tech startups to creative agencies, offering a versatile and visually appealing solution.