# React Native and Expo project structure and configuration

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The starter is a normal Expo application. Application identity and native settings live in
`app.json`; form0 application conventions live in `form0.config.js`.

```text
.
├── app.json
├── form0.config.js
├── assets/
├── scripts/
└── src/
    ├── components/
    ├── field-renderers/
    ├── forms/
    ├── lib/
    ├── pages/
    └── supporting-images/
```

## Expo configuration

Use `app.json` for the app name, slug, version, orientation, icons, splash screen, platform options,
and other Expo settings. Review these placeholder values before distributing an application.

## form0 configuration

`form0.config.js` controls:

- form layout and label placement;
- theme mode and theme overrides;
- initial edit or view behavior;
- keyboard scrolling offset;
- renderer identifiers;
- output field-key selection;
- local SQLite storage; and
- Expo development-server integration used by `form0 serve --app`.

Keep machine-specific public development URLs in `.env.local`. Do not place secrets in Expo public
configuration or in values bundled into the client application.

The [CLI project configuration reference](/cli/project-configuration) documents shared form0
settings. Continue with [Forms, screens, and navigation](./forms-screens-navigation).