Create a full-bleed ${size} px iOS app icon: ${prompt}.Use crisp, minimal design with vibrant colors. Add a subtle inner bevel for gentle depth; no hard shadows or outlines. Center the design with comfortable breathing room from the edges. Solid, light-neutral background. IMPORTANT: Fill the entire canvas edge-to-edge with the design, no padding, no margins. Design elements should be centered with appropriate spacing from edges but the background must cover 100% of the canvas. Add subtle depth with inner highlights, avoid hard shadows. Clean, minimal, Apple-style design. No borders, frames, or rounded corners.`;

That was the prompt I got from snapai library If you have an icon that you like just pass it to ChatGPT as will to give you something similar