Design · Prompt
iOS App Icon Prompt for GPT-4o
A structured prompt for generating spec-compliant iOS app icons with GPT-4o
A concise prompt template created by Evan Bacon for generating production-ready iOS app icons using GPT-4o. It specifies Apple design guidelines such as square dimensions, color spaces, safe zones, and style constraints to avoid common AI generation issues like unwanted rounded corners. It works as a one-shot prompt alongside an optional reference image.
The prompt
Create an iOS app icon based on this image.
- Icon should fill the entire image. Apply no icon mask or border radius.
- Use vibrant Display P3 colors.
- Image should be square 1024x1024 with no transparency.
- Respect the golden ratio (1:1.618). Essential content (logos, visuals) should be within ~80%-85% of the icon's width/height.
- Embrace simplicity. Prefer a simple background that puts the emphasis on the primary image.
- Prefer vector graphics over photos or screenshots, which lose clarity at small sizes.
The image input can be replaced with any subject; the example in the tweet uses an astronaut photo over Earth and produces a flat vector astronaut icon on a blue background.
What it's for
- Generate iOS app icons from reference sketches or photos in one attempt
- Ensure AI image models do not bake rounded corner masks into icon exports
- Draft app store visual assets that adhere to Apple design guidelines and safe zones
Key points
- Instructs the model to output a square 1024x1024 image with no transparency
- Explicitly forbids baking in icon masks or border radiuses
- Enforces Display P3 vibrant color usage
- Defines an 80%-85% safe zone based on golden ratio proportions
- Directs the output toward simplified vector styles rather than photographic detail
Pricing
Free
Details
- Type
- Prompt
- Category
- Design
- Topic
- AI Prompts
- Open source
- No
- Platforms
- Web, other
- For
- iOS developers, indie hackers, and app designers
- Tags
- prompts, ios, app icon, gpt 4o, design
Why it was saved
- @Baconbrix: Proven prompt by Evan Bacon for generating polished, spec-compliant iOS app icons from GPT 4o.
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