✨ AI app builder & workflow automation

Build apps, websites & AI workflows by describing them

Tell the agent what you want. It writes the code, shows you a live preview, and ships it — installable Android apps, published websites, browser games, and automations that run themselves.

No install needed — runs in your browser. Prefer an app? Grab the Android APK above.
5 project types Live device preview 1-click web publishing APK exports for Android Visual workflow canvas
What you can build

One agent. Five kinds of software.

Pick a project type, describe what you want, and iterate in plain English — the agent writes and rewrites the code for you.

📱

Mobile apps

Real React Native apps in a live phone emulator — then export an installable Android APK when you're ready.

React Native → APK
🌐

Websites

React or plain HTML sites with desktop, tablet and mobile preview. Publish to your own URL in one click — unpublish anytime.

appbuilderagent.com/p/your-site

AI workflows & agents

TypeScript automations with AI steps, tool-using agents, conditionals, loops and sub-workflows — on a visual canvas.

n8n-style flow view
🕹️

Web games

Canvas and three.js games that run in the browser — playable with keyboard and touch, publishable like any website.

canvas · three.js
🎮

Mobile games

Touch-first React Native games with game loops and sprites, previewed on a phone frame and exported as APKs.

React Native → APK
🗄️

…with a real backend

Apps get an API and a database that run right in the preview — the agent designs the schema and wires the endpoints.

API + DB built in
From prompt to product

Watch every kind of project take shape

Not just workflows — apps, websites and games are built the same way: you describe, the agent codes, the preview updates live.

Describe an app. Watch it run on a phone.

The agent writes real React Native code and runs it instantly in a live phone emulator — screens, navigation, gestures and all.

  • Live emulator with navigation & gestures
  • A backend API and database, built in
  • One-click APK — install it on your Android
Build a habit tracker with streaks 🔥
Creating the Home screen, streak logic and reminders…
✓ App.tsx ✓ screens/Home.tsx ✓ lib/streaks.ts

Websites that go live in one click.

React or plain HTML, previewed at desktop, tablet and phone widths — then published to your own URL the moment it's ready.

  • React or plain HTML — your choice
  • Hosted at appbuilderagent.com/p/your-site
  • Republish after changes, unpublish anytime

Games people can actually play.

Web games on canvas or three.js, and touch-first mobile games in React Native — with game loops, sprites and score handling written for you.

  • Browser games: canvas & three.js
  • Mobile games: React Native, exported as APKs
  • Keyboard + touch controls out of the box
How it works

From idea to shipped in four steps

1

Describe it

“A recipe app with favorites and a shopping list.” The agent plans the screens, data and logic — and asks when it needs a decision from you.

2

Watch it build

The agent writes real code, file by file, and checks its own work — running your app and fixing the errors it finds before you ever see them.

3

Preview live

Every change appears instantly in a live preview — a phone emulator for apps and games, desktop/tablet/mobile frames for websites, a flow canvas for workflows.

4

Ship it

Publish websites to your own URL, download an installable APK, or run your workflow — in the browser or privately on our servers.

AI workflow automation

Automations you can see

Describe an automation and the agent builds it as a visual flow — every step traced, every run inspectable.

Real code, visual clarity

Workflows are TypeScript underneath — no black boxes. The canvas shows conditionals, loops, custom code nodes, AI steps and tool-using agents; flip to the code view whenever you want.

  • Conditionals, loops & custom code nodes
  • Compose workflows into bigger workflows
  • AI agents with your own tools, auto-traced
  • End-to-end tests the agent can write and run
defineWorkflow({
  id: 'daily-digest',
  run: async (ctx, input) => {
    const items = await ctx.step('fetch items', fetchAll);
    const keep  = await ctx.branch('important?', …);
    const md    = await ctx.ai('Summarize: ' + keep);
    return output.markdown(md, { items: keep });
  },
});
▶ Run            ☁ Run on server

 fetch items         201ms
 important?          condition → true
 summarize           AI step · 1.2s
 Output              rendered webpage

Viewable | Raw

Outputs you can read, runs you can trust

Results render as webpages, markdown documents, images or video — with the raw JSON one switch away. Run workflows in your browser, or deploy them to our servers.

  • Rich outputs: React pages, markdown, media
  • Live step timeline with logs and durations
  • Server runs are strictly private to your account
  • Bring your own models: OpenRouter, OpenAI, local Ollama
Preview everywhere

See it on every screen before anyone else does

Websites and games render in desktop, tablet and phone frames. Mobile apps run in a real phone emulator with navigation, gestures and a working backend — right next to the chat.

FAQ

Questions, answered

Is App Builder Agent free?
Yes — the Free plan includes 50K AI tokens every month with all features included, enough to try the agent and build your first mini project. Upgrade to Pro (10M tokens/month, $19) or Max (50M tokens/month, $59) when you're building for real. The editor and live preview work without an account.
Do I need to install anything?
No. Everything — the editor, the device preview, the backend, the database and the workflow runner — runs in your browser. There is nothing to download or set up.
What can I build with it?
Five project types: mobile apps (React Native, exported as installable Android APKs), websites (React or plain HTML, published at your own URL), web games, mobile games, and AI workflows & agents in TypeScript with a visual flow canvas.
How do AI workflows work?
You describe the automation and the agent writes a TypeScript workflow with traced steps, conditionals, loops and sub-workflows. You see it as an n8n-style diagram, run it in one click, and outputs render as webpages, markdown, images or video. Workflows can also run on our servers — always private to your account.
Which AI models does it use?
Platform-managed models work out of the box, and you can bring your own: OpenRouter, OpenAI, or a local Ollama instance running on your machine.
Are my projects and workflows public?
Only what you choose to publish. Websites go live only when you publish them to a URL you pick, and you can unpublish anytime. Workflows deployed to the server are strictly private to your account — they have no public URL.

Describe it. Ship it.

Your first app, website or automation is one sentence away.

Start building — it's free