# Application Structure Gravity follows a simple **Model–View–Controller (MVC)** pattern with a REST API. This keeps your codebase predictable, easy to extend, and easy for AI tools to work with. #### By Architecture **Next.js** \ \ The MVC pattern is implemented within a single app: * **Models** → Database schemas and data logic * **Controllers** → Server actions / API route handlers * **Views** → React components (pages + UI) Routing and backend logic are co-located, removing the need for a separate server. *** **Node.js**\ \ Gravity Server is structured as a traditional MVC backend: * `server.js` → Entry point of the application * `api/` → Route definitions (maps requests to controllers) * `controllers/` → Business logic * `models/` → Database schemas Client applications (Web / Native) communicate with this server via REST APIs. ## Controllers Controllers are located inside the `/controller` directory, the following come as standard: * accountController * aiController * authController * demoController * eventController * feedbackController * inviteController * jobController * keyController * pushtokenController * setupController * socialController * userController * utilityController ## Models Models are located in the `/model` directory, and the following are included for you: * account * auth * demo * email * feedback * invite * key * knex * log * login * mongo * openai * pushtoken * setup * stripe * token * user ## Helpers Helpers are located in the `/helper` directory, and the following are included for you: * chart * file * mail * notification * s3 * utility ## Views Views are where your UI components and live. Their location depends on your architecture and client: **Next.js** * Located inside: `/src/app` * Pages, layouts, and React components live alongside server actions and API routes * Allows co-locating frontend and backend logic for faster development and simpler imports **Gravity Web** * Located at: `/client/src/views` * Contains web-specific pages and UI components **Gravity Native** * Located at: `/app/views` inside your Gravity Native project folder * Contains mobile screens and components {% embed url="" %}