Prerequisites & Tooling

Install these once. The right-hand column is how you check each one is ready.

Tool	Minimum	Verify
Node.js	20+	node -v
pnpm	9+	pnpm -v
EAS CLI	latest	eas --version (install: npm i -g eas-cli)
firebase-tools	latest	npx firebase --version
Xcode (macOS, for iOS)	latest stable	xcodebuild -version
Android Studio + SDK	latest	adb --version

We use pnpm as the package manager. It’s faster and stricter than npm about your dependency tree, which catches “works on my machine” bugs early. Enable it with Corepack if you don’t have it: corepack enable && corepack prepare pnpm@latest --activate.

Accounts you’ll need

• Expo — for builds and OTA. Log in with eas login.
• Apple Developer — required to sign and ship iOS builds (both ad-hoc testing and the App Store).
• Firebase — access to the project used for internal test distribution.

Once every row above checks out, move on to Create or Clone a Project.