Expo Project Structure

A starting skeleton for a new Expo app — one with no committed folder structure yet.

Apply only to new projects. If the app already has a layout, follow its existing conventions and leave files where they are — a default to start from, never a standard to enforce or migrate toward. When unsure whether a project is new, ask before moving anything.

The whole layout, assembled from the rules below:

├── assets/
├── scripts/
├── src/
│   ├── app/                       # Expo Router routes ONLY — every file is a route
│   │   ├── api/                   #   server API routes, grouped here
│   │   │   ├── user+api.ts
│   │   │   └── settings+api.ts
│   │   ├── _layout.tsx
│   │   ├── _layout.web.tsx         #   platform-specific layout
│   │   ├── index.tsx
│   │   └── settings.tsx
│   ├── components/                 # reusable UI: button, card, table…
│   │   ├── table/                  #   complex component → folder + index.tsx
│   │   │   ├── cell.tsx
│   │   │   └── index.tsx
│   │   ├── bar-chart.tsx
│   │   ├── bar-chart.web.tsx        #   platform-specific variant
│   │   └── button.tsx
│   ├── screens/                    # screen bodies that route files render
│   │   ├── home/
│   │   │   ├── card.tsx            #   used only by Home — not shared
│   │   │   └── index.tsx           #   rendered by src/app/index.tsx
│   │   └── settings.tsx
│   ├── server/                     # server-only helpers used by app/api
│   │   ├── auth.ts
│   │   └── db.ts
│   ├── utils/                      # standalone helpers + colocated tests
│   │   ├── format-date.ts
│   │   └── format-date.test.ts
│   ├── hooks/                      # reusable hooks: use-theme.ts…
│   ├── constants.ts
│   └── theme.ts
├── app.json
├── eas.json
└── package.json