Generate App Screen Mockups
Create pixel-perfect mobile app screen mockups from an app idea, platform, and brand colors using AI, then save them to Google Drive.
Generate App Screen Mockups
This workflow creates detailed, platform-specific mobile app screen mockups from a simple app idea. You provide the concept, choose iOS or Android, and optionally specify brand colors — the workflow handles the rest, producing cohesive, production-ready screens and saving them to Google Drive.
What It Does
- Receives your input via a webhook: app idea, platform (iOS or Android), and optional brand colors.
- Plans the screen set using an AI agent acting as a senior UI/UX designer. It always includes essential screens (Splash, Login/Signup, Paywall) and infers additional screens relevant to your app idea.
- Generates each screen as a pixel-perfect flat UI mockup by looping through the planned screens and feeding the previous screen's image into the next prompt for visual consistency.
- Uploads images to ImageKit for hosting, then transfers them to a dedicated Google Drive folder.
- Returns a summary with links to all generated screen files in Google Drive.
What You Need
- A Needle platform account with access to AI and HTTP request nodes.
- An API key for a generative image AI service to produce screen images.
- An API key for ImageKit (or a similar image hosting service) for intermediate image hosting.
- A connected Google Drive account for final file storage.
How the Flow Works
| Step | Node | Description |
|---|---|---|
| 1 | Webhook Trigger | Receives input with prompt (app idea), platform (iOS/Android), and brandColors (optional hex codes). |
| 2 | AI Agent | Generates a structured design plan with screen names and detailed visual briefs, following platform-specific guidelines. |
| 3 | Loop | Iterates over each planned screen to generate mockups one at a time. |
| 4 | Code (Prompt Builder) | Constructs a detailed image generation prompt for each screen, including the previous screen's image for style consistency. |
| 5 | HTTP Request (Image Gen) | Sends the prompt to the generative image API and receives a screen mockup in 9:16 aspect ratio. |
| 6 | Code (Response Handler) | Extracts and validates the generated image from the API response. |
| 7 | Code (Upload Prep) | Prepares multipart upload payloads for ImageKit. |
| 8 | HTTP Request (ImageKit) | Uploads each screen image to ImageKit for hosted URLs. |
| 9 | Google Drive Folder | Creates a named folder in Google Drive for the app's screens. |
| 10 | Google Drive Upload | Downloads each image from its hosted URL and saves it to the Drive folder. |
| 11 | Code (Summary) | Compiles a final summary with file names, Drive file IDs, and direct links. |
Webhook Input
| Field | Required | Description |
|---|---|---|
prompt | Yes | A description of your app idea (e.g., "A fitness tracking app that helps users log workouts and compete with friends"). |
platform | No | iOS or Android. Defaults to iOS. |
brandColors | No | Comma-separated hex codes. If omitted, the AI selects a professional palette. |
Output
A set of up to 7 high-quality mobile app screen mockups saved to Google Drive. Each screen follows platform-specific design guidelines (Human Interface Guidelines for iOS, Material Design for Android) and shares a unified design system for color, typography, spacing, and component styling.
Notes
- The workflow enforces a maximum of 7 screens to keep the design focused and manageable.
- Paywall screens always include actual pricing tiers with dollar amounts and clear call-to-action buttons.
- Screens are generated without device frames or annotations, making them suitable for direct use in presentations or handoff to developers.
- Visual consistency is maintained by feeding the previous screen's image into each subsequent generation prompt.
- ImageKit is used as an intermediate host to avoid payload size limits when uploading to Google Drive.
- Adjust API keys and endpoints based on your own service configuration.
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