CLI Reference

1/21/2026

Complete reference for Expo CLI commands.

Commands

`npx expo start`

Starts the Expo development server.

Usage:

npx expo start

Options:

-c, --clear: Clear the Metro bundler cache.
--android: Open on Android emulator.
--ios: Open on iOS simulator.

`npx expo prebuild`

Generates native projects for building.

Usage:

npx expo prebuild

`eas build`

Build your app for production using EAS Build.

Usage:

eas build --platform android
eas build --platform ios

`help`

Show help information.

Usage:

npx expo --help

API Backend (Go)

The Go api-backend foundation boots with a health endpoint and can serve the shared /api/v1/app mobile contract when the gateway routes that prefix to Go performance mode.

Rename Package & App Name

Learn how to rename your application ID, package name, and display name for production readiness.

On this page

Commands npx expo startnpx expo prebuildeas buildhelp