AI App Builder

Describe an app.
Get the full codebase.

Tell it what you want to build. It plans the project, then generates the real source code step by step — a production-ready codebase you own, edit, and ship anywhere.

How it works

01

Describe & plan

Write your idea in one line. It returns a full plan first — architecture, data model, screens, even a market read and a tier roadmap — before any code.

02

Generate step by step

It writes the real project files for you, phase by phase. You advance one step at a time and watch the codebase appear live — nothing to compile or run to get it.

03

Review & download

Look over each step as it's built, fix any issue in one tap, then download the whole project as a .zip. The code is yours.

Engineered to not break

Most AI tools dump one giant file that's truncated, half-finished, or full of "TODO" stubs. This engine is built to avoid exactly that.

Plans before it builds

A full spec — architecture, data model, screens, tiers — is produced and confirmed before a line of code.

Reviewed at every step

Each generated step is checked before you move on, so a broken part is caught early — not at the end.

No truncated files

Every file is verified complete on write. If output is cut off, it resumes exactly where it left off.

No lazy stubs

It refuses "// TODO: implement" placeholders and emits real, complete logic instead.

One-tap BUGFIX

Describe a problem and get a precise, targeted fix back — and it remembers the lesson for the rest of the build.

Resume anytime

Long builds survive across sessions: pick up where you stopped and regenerate any single step on demand.

Production-ready by default

Every project comes with the foundations you'd build by hand — already wired up.

Authentication & roles

User and admin accounts, sessions, and protected areas out of the box.

Security baked in

Row-level access rules, encrypted secrets, and safe handling of keys and inputs.

Validation & error contracts

Every input is validated and every API response follows one consistent shape.

Tests, docs & smoke checks

Generated tests, full setup/deploy docs, and a smoke test that proves the app boots.

Clean architecture

Sensible structure, typed code and clear separation — code you can actually maintain.

You own everything

Real source code, no platform lock-in, no black box. Edit and host it anywhere.

What you can build

Start from a one-line idea — here are a few.

idea →

A restaurant table-booking SaaS with QR check-in

idea →

A gym membership & class-scheduling platform

idea →

A multi-vendor local services marketplace

idea →

An inventory & invoicing tool for small shops

idea →

A course platform with payments and a student area

idea →

An internal admin dashboard with roles and audit logs

You stay in control

Simple commands drive the whole build.

✅ NEXT · build the next step 🚀 CONTINUE · resume if output was cut 🐛 BUGFIX · describe a problem, get a fix 🔄 REGENERATE · rebuild one step 📦 SNAPSHOT · save & resume later

Build across many stacks

Next.js + Supabase Flutter + Firebase + PHP API React Native Node Fullstack & API PHP Fullstack Android Kotlin Python / Flet WordPress Theme

Questions

Do I own the generated code?

Yes. You get real source code with no platform lock-in — edit it, host it, and ship it anywhere, including commercially.

Is this no-code?

No. It's a code generator for developers. You get a real project you customise and run — not a locked drag-and-drop app.

Do I need my own API key?

Yes. You bring your own Anthropic (Claude) API key, so usage is billed to you directly by your provider. Your key is stored encrypted and never shared.

What if a step has a problem?

Use BUGFIX — describe the issue and get a precise fix back. You can also resume a step that was cut off, or regenerate any single step without losing your place.

Do I need to install anything to use it?

No. Planning, generating and downloading all happen in your browser, on a computer or phone — there are no tools to install to get your code. You only need the usual tools for your chosen stack (for example Flutter or PHP) when it's time to run the finished project, and each project's docs spell those out.

Why one step at a time — can't it just give me the finished project?

A full codebase is too large to output in one go, so it's split into ten steps. Generating them one by one is deliberate: it avoids truncated, half-written files and means a problem shows up immediately at that step — not buried in a broken final zip. The console guides you through each one.

How do I run what it generates?

Each project downloads as a .zip with full setup and deploy docs, plus a smoke test that proves the app boots. Unzip it and follow the project's docs — they list the exact commands for your chosen stack.

How do I get help?

Email us at support@aimultistack.codes and we'll get back to you.

Ready to build?

Create an account, add your AI key, and generate your first codebase today.

Start building free