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    Vibe coding prompts for mobile apps

    Written by the Fastshot team from the Fastshot user guides. Updated .

    Good prompts name the screens, the data and the design, and each follow-up changes one thing. Fastshot builds from concrete descriptions, such as a grid of saved recipes or a dark blue login screen, so specific requests beat abstract ones like “make it look better”. You never need to write code, file paths or imports.

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    The more concrete your description, the closer the first version is to what you pictured. Specific screens and features beat abstract ideas.

    1. 1. Name the screens

      List the screens you want: home, profile, settings and so on. “A recipe manager with a home screen showing saved recipes in a grid, a detail page with ingredients and steps, and a form to add new recipes with photo upload” works better than “make me a cooking app”.

    2. 2. Describe your data

      Say what the app works with: recipes, tasks, transactions. This shapes the screens and the forms.

    3. 3. Give design preferences

      Mention dark mode, a minimal or colorful style, or exact colors. “Change the login screen background to dark blue (#1a1a2e) and make the sign-in button rounded with white text” is a request Fastshot can carry out exactly.

    4. 4. Change one thing per message

      For follow-ups, name the screen, component or behavior and make one change at a time. You can refer to earlier work: “On the profile screen you just built, add a logout button”.

    5. 5. Describe bugs as expected versus actual

      Say what is happening and what should happen instead, instead of “it is broken”.

    6. 6. Use reference material

      Upload a screenshot (“Make my app look like this design”), paste a website URL for its colors and layout, or describe another app, such as the layout of Instagram’s profile page.

    Good to know

    • You do not need code snippets, file paths or imports: Fastshot handles those.
    • Avoid vague requests such as “improve the UI” without saying what to improve.

    Frequently asked questions

    What are good vibe coding prompts for a mobile app?
    Specific ones. Name the screens, describe the data and give design preferences: “A recipe manager with a home screen showing saved recipes in a grid, a detail page with ingredients and steps, and a form to add recipes with photo upload” beats “make me a cooking app”.
    What are the best practices for vibe coding an app?
    Name the screens, describe your data, state design preferences, and change one thing per message. Describe bugs as what happens versus what should happen, and use screenshots, a website URL or another app as reference.
    How do I write a prompt to build an app with AI?
    Include the app’s purpose, target users, core features and design goals. Fastshot may ask one or two clarifying questions, then writes a plan. You do not need code snippets, file paths or imports.
    Should I ask for many changes at once?
    No. One change per message works best for precision. Name the screen, component or behavior, and you can refer to earlier work, for example “On the profile screen you just built, add a logout button”.
    How do I describe a bug to the AI?
    Say what is happening and what should happen instead, rather than “it is broken”. For visual issues, mention exact colors, sizes or layout positions.
    Do I need to write code in my prompts?
    No. Code snippets, file paths and imports are not needed: Fastshot handles them. Avoid vague requests such as “improve the UI” without saying what to improve.
    Can I give Fastshot a reference design?
    Yes. Upload a screenshot (“Make my app look like this design”), paste a website URL for its colors and layout, or describe another app, such as the layout of Instagram’s profile page.

    Related: Vibe coding

    Next lesson: Add a Supabase backend: sign-in, database and file storage

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