No Code Mobile App Builder
Describe an app. Baby 4.0 plans the screens, writes the React Native code, and streams a working prototype back to you — no code, no setup.
How it works
Describe your idea
Type a natural-language prompt — one sentence or a full spec. Attach reference images if you have them.
Baby 4.0 builds it
Our agent plans the architecture, writes the files, and streams the whole thing back to you as it goes.
Iterate & ship
Preview live, chat to refine, restore any version, and publish — Baby 4.0 keeps the whole project in context.
Built on Baby 4.0
Powered by Baby 4.0
Describe your project and work with Baby 4.0 to generate and refine its screens and code.
Real-time streaming
Watch each file appear as Baby 4.0 thinks it through — no black-box generation, no waiting on a spinner.
Chat to iterate
Follow-up in natural language. Baby 4.0 keeps context across the session so refinements feel like pair-programming.
Version history
Every generation is snapshotted. Restore any prior state instantly — the current files are auto-snapshotted first.
Yours to keep
Every project lives in your Brainbaby workspace and syncs across sessions. Export the source whenever you want.
Beautiful by default
Modern typography, dark mode, and semantic tokens baked into every generated project. No generic AI aesthetic.
What you can build
Fitness Tracker
Workout logging, streaks, timers, and progress charts — native feel on iOS & Android.
Recipe & Meal Planner
Save recipes, plan the week, and build a shopping list from selected meals.
Habit & Journal App
Daily habits, mood check-ins, and a private journal — clean, minimal, tactile.
Local Discovery
Map-first UI with cards for restaurants, events, and hidden gems nearby.
Reading Companion
Track books, highlight quotes, set reading goals, and rate what you finish.
Marketplace App
List items, chat with buyers, and manage orders — small storefront in your pocket.
From a mobile prototype to a store-ready app
Describe screens and behavior
Start with the audience, the core task and a short screen list. For a workout tracker, specify adding an exercise, logging sets and reviewing progress. Include empty states and what should happen when a user makes a mistake.
Test on real devices
Check navigation, keyboard behavior, small screens and any camera or notification permissions. If the app needs accounts or shared data, configure and test the backend and access rules before using real customer information.
Prepare your store submission
Review the generated source, dependencies and assets. Set up signing and developer accounts, then prepare screenshots, a privacy policy and store information. Apple and Google review submissions independently; a generated prototype is not an approved store listing.
Frequently asked questions
Does this build real native iOS and Android apps?
Baby 4.0 generates a React Native + Expo project for iOS and Android. Preview and refine the project before preparing a signed build. Store distribution also requires developer accounts, signing configuration and the relevant store review.
Is it really no code?
Yes. Describe the app in plain English — Baby 4.0 plans the screens, writes the components, and streams the whole thing back as it goes. You never have to open an editor, though the source is there if you want it.
What model powers the no code mobile app builder?
Baby 4.0 is the coding engine used by this builder. Describe the screens and behavior you need, review the generated project, and use follow-up prompts to refine it.
Can I keep working on my apps later?
Every app auto-saves to your Brainbaby workspace. Log back in from any device, open the project, and continue building. Version history lets you restore any prior state.
How is this different from Lovable or Rork?
Brainbaby is mobile-first, powered by Baby 4.0's long context window, and includes native templates for fitness, journaling, recipe, and marketplace apps out of the box.
Is my code mine to keep?
You can export your project source and continue working on it outside Brainbaby. Review the terms and licenses of any third-party packages or assets included in your app.