Syntic

Build, Chat and Plan modes in App Builder

Let App Builder change your app, just talk it through, or get a plan to approve first.

Product
App Builder
Level
Beginner
Time
5 minutes
Works in
Web app
Reviewed
16 Oct 2026

What you will accomplish

  • Switch between the three modes
  • Ask questions without changing your app
  • Approve a plan before anything is built

Before you start

  • An app in App Builder

  1. Step 1: Find the mode switch

    In the chat box, click the pill showing the current mode. The Composer mode menu opens. You can also press Alt + P (⌥ P on a Mac) to cycle Build → Chat → Plan.

  2. Step 2: Build: make changes

    Build ("Make changes directly") is the default. Whatever you ask is applied to your app. Type @ to point at a specific file or asset.

  3. Step 3: Chat: ask without changing anything

    Chat ("Ask anything, explore ideas") answers questions about your app, and nothing is changed. Each Chat message costs under 1 credit: it's billed by tokens from your App Credits and capped below one credit.

  4. Step 4: Plan: review before building

    Plan ("Detailed spec for complex builds") turns your description into a plan you can read and edit. Nothing is built until you click Approve and build (or Save and approve if you edited the plan).

Tips

  • App Builder remembers the last mode you used for each app.

Next step

Build your first application · Lesson 3 of 5

Change your app's theme in the Design panel

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