App Builder
Describe it. Watch it run.
Type what you want and get a working app back with a live, sandboxed preview. Iterate in chat, then share it with a link.
From zero to shipped in three steps
- Step 1
Describe the app
Start with a plain-language prompt: what the app does, what it should look like, and how it should behave. No scaffolding, no boilerplate, no project setup to wire up first.
- Step 2
Preview it instantly
App Builder generates a working single-file app and renders it in a live, sandboxed preview. You see the real thing running, not a mockup or a wall of code to assemble.
- Step 3
Iterate and share
Refine the app by talking to it: change the layout, add a feature, fix a bug. When it is ready, share it with a link or download the file and run it anywhere.
Built for shipping, not fiddling
Live sandboxed preview
Every build renders in an isolated preview the moment it is generated. You interact with the real running app, so you catch issues by using it, not by reading code.
Iterate in chat
Keep talking to the app to change it. Ask for a new feature, a different layout, or a fix, and App Builder revises the same app in place instead of starting over.
Share with a link
Publish any build to a shareable link so anyone can open and use it without signing in. Send it to a teammate, a client, or drop it in a thread.
Download the file
Every app is a single self-contained file. Download it and run it locally, host it yourself, or drop it into another project. Nothing is locked inside the builder.
Credit pricing, no subscription
A new app costs 20 credits and each revision costs 5. You always see the cost before you commit, and you only pay for the builds you actually make.
Credits that travel
App Builder runs on the universal Developers Digest credit balance. The same credits power chat, image generation, and every other app in the suite.
Common questions
What is App Builder?
App Builder turns a plain-language prompt into a working single-file app with a live, sandboxed preview. You describe what you want, see it run, refine it in chat, and share it with a link or download the file.
What kind of apps can I build?
Self-contained single-file apps: tools, calculators, dashboards, small interactive pages, prototypes, and demos. Because each app is one file, it stays easy to preview, share, and download.
How do I change an app after the first build?
Keep talking to it. Ask for a new feature, a layout change, or a fix, and App Builder revises the same app in place. Each revision updates the live preview so you see the change immediately.
How does pricing work?
App Builder runs on credits. A new app costs 20 credits and each revision costs 5. The cost is shown before you commit, and you only pay for the builds you make - there is no monthly quota to lose.
From the blog
App Builder: From a Prompt to a Working App You Can Watch Run
Describe an app in plain language and get a working single-file build back with a live sandboxed preview. Revise it by talking to it, share it with a link, or download the file.
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