Stable Diffusion Image Generator UI in SwiftUI

Want a Stable Diffusion image generator with a clean UI in SwiftUI? The short answer: it is a prompt box, a patient progress state, and a result gallery. The interesting decisions are underneath, where the model runs, where the API key lives, and how you keep generation safe and honest. Build the UI from a free VP0 design, the free iOS design library for AI builders, and pick the architecture that fits your app.

Who this is for

This is for builders adding AI image generation, art, avatars, design tools, who want a polished generator and need to handle keys, on-device versus API, and content safety responsibly.

On device or through a server

There are two ways to run Stable Diffusion, and the UI is the same for both. On device with Core ML: the model runs locally, so images are private and cost nothing per generation, but you need a capable device and a bundled or downloaded model, and generation is slower on older hardware. Through an API like Stability AI: simpler and faster to ship, but each image costs money and the request must go through a server you control following security best practices, so the key is never in the app. Your SwiftUI screen, a prompt, options, a progress view, and a gallery, stays the same; only the generate call changes.

Aspect	On device (Core ML)	Via API
Privacy	High, stays on device	Depends on provider
Cost	None per image	Per-image charge
Speed	Device-dependent	Server-dependent
Key risk	None	Must proxy via server
Ships fastest	Slower to set up	Quicker to start

Build it free with a VP0 design

Pick an image generator or gallery design from VP0, copy its link, and prompt your AI builder:

Rebuild this VP0 image generator design in SwiftUI: [paste VP0 link]. Add a prompt input with size and count options, a clear generation progress state, and a result gallery with save and share. Either call the model through my server so the key never ships, or run it on device with Core ML. Apply a safety filter and label images as AI-generated.

AI image generation has scaled fast, with well over 15,000,000,000 AI images created since the tools went mainstream, so a thoughtful generator stands out by being safe and honest. For neighboring AI media patterns, see an AI headshot generator app source code, an ElevenLabs text-to-speech player UI, an AI music generator with a waveform player UI, and the OpenAI API wrapper app template for key handling. To monetize generations, see freemium vs free trial paywall design.

Safety and rights

This is the part that separates a responsible image app from a liability. Apply a content safety filter so the app does not generate harmful or non-consensual imagery, and respect the model’s content policy. Disclose that images are AI-generated, especially if they could be mistaken for photos of real people. And be honest about usage rights: what a user may do with a generated image depends on the model and provider terms, so state them rather than implying everything is free to use commercially. Safe, honest generation protects your users and your app.

Common mistakes

The first mistake is shipping the API key in the app instead of proxying it. The second is no progress state, so slow generation looks frozen. The third is no safety filter, inviting harmful content. The fourth is implying generated images are unconditionally yours to use commercially. The fifth is paying for a generator kit when a free VP0 design plus Core ML or an API does it.

Key takeaways

• The UI is a prompt, a progress state, and a result gallery.
• Run on device with Core ML for privacy, or via API proxied through your server.
• Never ship the API key in the app.
• Apply a safety filter, disclose AI-generated images, and state usage rights.
• Build the generator free from a VP0 design.

Frequently asked questions

How do I build a Stable Diffusion image generator in SwiftUI? Build a prompt input with options, a generation progress state, and a result gallery, running the model on device with Core ML or through a server, with a safety filter.

What is the safest way to build an image generator with Claude Code or Cursor? Start from a free VP0 design, either run on device with Core ML or proxy the API through your server so the key never ships, apply a safety filter, and disclose AI-generated images.

Can VP0 provide a free SwiftUI or React Native template for an AI image app? Yes. VP0 is a free iOS design library; pick an image generator design and your AI tool rebuilds the prompt, progress, and gallery at no cost.

Should I run Stable Diffusion on device or through an API? On device with Core ML gives privacy and no per-image cost but needs a capable device; an API is faster to ship but costs per image and must be proxied through your server.