Build production web apps from a prompt
Describe the app you want in plain language. FirstApp designs it, writes the code, shows you a live preview, and deploys it to your own domain — no boilerplate, no config, no ops.
Your idea, shipped as a real app
FirstApp is an AI app builder that turns a description into a full, working web application — frontend, backend, database and all — then puts it online for you. You stay in the conversation; we handle the engineering.
Prompt → App
Describe what you want in plain words. FirstApp plans the architecture, writes production code and wires up the data — end to end.
Live preview
Watch your app come to life as you chat. Every change renders instantly in an interactive preview — click through it before you ship.
One-click deploy
Go live on a fast global edge network with a single click. No servers to manage, no build pipelines to configure — it just works.
Your own domain
Connect a custom domain in a few clicks with automatic HTTPS. Your app, your brand, your URL — production-ready from day one.
Three steps to a live app
From a blank prompt to a deployed product on your own domain — usually in a single sitting.
Describe it
Tell FirstApp what you want to build — the features, the flows, the look. Refine it conversationally until it's exactly right.
Preview & refine
See a working app in real time. Ask for changes in plain language and watch them apply live — no code required.
Deploy & share
Push it live with one click, attach your custom domain, and share the URL. Iterate any time by just chatting again.
Ready to build your first app?
Start with a single prompt. Have something real, online and on your own domain today.
Open FirstApp