---
id: running-on-simulator-ios
title: Running On Simulator
layout: docs
category: Guides (iOS)
permalink: docs/running-on-simulator-ios.html
next: communication-ios
previous: running-on-device-ios
---

## Starting the simulator

Once you have your React Native project initialized, you can run `react-native run-ios` inside the newly created project directory. If everything is set up correctly, you should see your new app running in the iOS Simulator shortly.

## Specifying a device

You can specify the device the simulator should run with the `--simulator` flag, followed by the device name as a string. The default is `"iPhone 6"`. If you wish to run your app on an iPhone 4s, just run `react-native run-ios --simulator "iPhone 4s"`.

The device names correspond to the list of devices available in Xcode. You can check your available devices by running `xcrun simctl list devices` from the console.