$ npm install react-native-detect --save

$ react-native link react-native-detect

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-detect and add RNDetect.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNDetect.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.lovescomputers.RNDetectPackage; to the imports at the top of the file
• Add new RNDetectPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-detect'
   project(':react-native-detect').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-detect/android')
   

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-detect')
   

Read it! :D

1. In Visual Studio add the RNDetect.sln in node_modules/react-native-detect/windows/RNDetect.sln folder to their solution, reference from their app.
2. Open up your MainPage.cs app

• Add using Detect.RNDetect; to the usings at the top of the file
• Add new RNDetectPackage() to the List<IReactPackage> returned by the Packages method

import RNDetect from 'react-native-detect';

// TODO: What to do with the module?
RNDetect;