🚀 Builder is in early access. Build your first Flutter app free — claim your spot →
Your AI Flutter engineer

What do you want to build?

Describe your app in plain language. Builder writes real Flutter, previews it live, and hands you the signed APK, AAB & keystore to ship it — no dev team, no code.

Real Flutter & Dart — you own the code
Try one:
No credit card Real Flutter & Dart Export anytime — no lock-in
Built on real Flutter & Dart — ships everywhere Android iOS Web

Trusted by founders shipping their first apps

Lumen Driftly Pocketly Vanta Health Northstar
1×
Codebase ships Android, iOS & web
0
Lines of Dart you have to write
100%
Real, exportable Flutter — no lock-in
How it works

From idea to App Store in three steps

No build configs, no SDK setup, no Gradle headaches. Builder handles the engineering so you can focus on the product.

STEP 01

Describe your idea

Tell Builder what you want to make — a marketplace, a habit tracker, a booking app. Plain language is enough to get a working first version.

STEP 02

Preview & refine live

Interact with your app in a real-time preview. Ask for changes, add screens, tweak the design — Builder updates the Flutter code as you go.

STEP 03

Generate & ship

Export a signed APK, a Play-ready AAB, and your keystore. Builder hands you exactly what each store needs to go live.

Features

A senior Flutter engineer, on demand

Everything you'd hire a mobile developer for — building, previewing, and shipping — wrapped into one AI-driven workspace.

Your AI Flutter engineer

Describe features in plain English. Builder plans the screens, writes the Dart, manages state, and explains what it did — like pairing with a senior mobile dev.

Live preview, instantly

Watch your app come to life in a real device frame as you build. Tap through flows, iterate on the spot, and see every change immediately.

Real Flutter, no lock-in

It's a genuine Flutter & Dart project under the hood. Export the full source anytime and keep building in any IDE. You're never trapped.

One-click builds

Turn your project into a release-ready APK or Google Play AAB without wrangling Gradle, SDKs, or build configs yourself.

Signing & keystores done right

Generate and manage your Android keystore (JKS), sign releases correctly, and handle versioning the way the stores expect.

Android, iOS & web

One Flutter codebase ships everywhere. Target Google Play, the App Store, and the open web from the same project.

Actually ship it

The real files that get you live

Most app builders stop at a preview. Builder takes you all the way — generating the signed, store-ready artifacts that turn a project into a published app.

.APK

Android package

Install directly on devices for testing, demos, and beta distribution.

.AAB

Android App Bundle

The optimized format Google Play requires — uploaded straight to the Play Console.

.JKS

Signing keystore

Generate and manage the keystore that signs your releases, with versioning handled for you.

iOS

App Store builds

Prepare the iOS artifacts and signing materials needed for TestFlight and the App Store.

Built for founders

You bring the idea.
Builder is the engineer.

Stop waiting on dev agencies and freelancer quotes. Validate, build, and launch your mobile app yourself — with an AI that knows Flutter inside out.

  • Go from concept to a working app in an afternoon
  • No coding, build tools, or DevOps to learn
  • Own real, exportable code — never locked in
  • Ship to the stores under your own account
Start building free

It's like having a Flutter engineer on the team who never sleeps — I described my app, watched it build in front of me, and walked away with an AAB ready for the Play Store.

Jordan L. · indie founder shipping with Builder
1
Codebase, every platform
0
Lines of code required
Founders, shipping

Built by people who'd never built an app before

Early access is full of first-time makers turning ideas into store-ready apps — without writing Dart.

"I described my app and watched it build in front of me. Walked away with an AAB ready for the Play Store the same afternoon."

Maya R.
Indie founder

"The signing and keystore step always scared me. Builder handled it like a senior engineer would and explained every move."

Daniel K.
First-time app maker

"Exported the source to check it was real Flutter — it was. Clean Dart, proper state management, no proprietary junk."

Priya S.
Solo developer
FAQ

Questions, answered

Everything founders ask before building their first app with Builder.

Do I need to know how to code to use Builder?
No. Builder is made for founders and indie makers. You describe the app you want in plain language and Builder's AI acts as your Flutter engineer — building screens, wiring up logic, and showing you a live preview. You can ship without writing a line of Dart, while still owning real, editable code underneath.
Is this real Flutter code, or a locked-in no-code wrapper?
It is genuine Flutter and Dart. Builder generates a real Flutter project — not a proprietary format you can never leave. You can export the full source at any time, hand it to a developer, and keep building in any IDE. No lock-in.
What files can Builder generate to actually ship my app?
Everything you need for the stores: a debug or release APK for direct installs and testing, an Android App Bundle (AAB) for Google Play, and a signing keystore (JKS) so your releases are properly signed. Builder walks you through signing and versioning the way a senior mobile engineer would.
What's the difference between an APK and an AAB?
An APK is a single installable Android package — great for testing or sideloading. An AAB (Android App Bundle) is the format Google Play requires for new apps; Google uses it to deliver optimized, smaller downloads per device. Builder produces both, plus the keystore needed to sign them.
Can Builder publish to iOS and the App Store too?
Yes. Because the output is Flutter, your app targets Android, iOS, and the web from one codebase. Builder helps you prepare iOS builds and the artifacts and signing materials each store expects.
Do I own my app and its code?
Completely. The project, the source code, and the generated artifacts are yours. Export them whenever you like and ship under your own developer account.
How much does Builder cost?
You can start building for free — no credit card required. Create an app, preview it live, and explore the workflow before deciding on a plan for production builds and store-ready artifacts.
Early access is open

Your app is one description away.

Join the founders building real Flutter apps with AI. Start free — no credit card, no setup, no dev team required.

Start building free See how it works

You own the code. Export anytime. No lock-in, ever.