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Testing on physical devices

The best way to interactively test and verify the behavior and feel of your app as you change code is by loading it in the Expo Go app, as described in other guides.
There are several ways to get the client app into a test environment.

Install Expo Go from a device's App Store

This is the simplest and easiest way, and the one we recommend for all developers.

The client apps are open-source, and their readme contains instructions on how to compile them locally and install them onto devices attached to your computer by a USB cable.

The Expo Go GitHub repository also includes instruction on how to build and run Expo Go for iOS on the Xcode device simulator, and Expo Go for Android on the Android Studio device emulator.