Adding truemetrics via Expo can’t be easier. Find more instructions and a demo app in our github repositories.
  1. Install dependencies
npm install expo-truemetrics-sdk
You may need to install additional dependencies: 
npx expo install expo-build-properties

npx expo install expo-location

npx expo install @react-native-async-storage/async-storage

npm install
Declare Android dependencies in app.json: 
"android": {
  ...
  "permissions": [
    "ACCESS_COARSE_LOCATION",
    "ACCESS_FINE_LOCATION",
    "ACTIVITY_RECOGNITION",
    "READ_PHONE_STATE"
  ]
},
For reference, SDK uses permissions: 
android.permission.FOREGROUND_SERVICE
android.permission.INTERNET
android.permission.HIGH_SAMPLING_RATE_SENSORS
android.permission.ACCESS_COARSE_LOCATION
android.permission.ACCESS_FINE_LOCATION
android.permission.ACCESS_BACKGROUND_LOCATION
android.permission.ACCESS_NETWORK_STATE
android.permission.CHANGE_NETWORK_STATE
android.permission.ACTIVITY_RECOGNITION
android.permission.READ_PHONE_STATE
android.permission.POST_NOTIFICATIONS
Add Maven repo for the SDK to plugins in app.json: 
[
  "expo-build-properties",
  {
    "android": {
      "extraMavenRepos": [
        "https://github.com/TRUE-Metrics-io/truemetrics_android_SDK_p_maven/raw/main"
      ]
    }
  }
]
Add to plugins in app.json: 
[
  "expo-location",
  {
    "locationAlwaysAndWhenInUsePermission": "Allow app to access location."
  }
]
  1. Start the app
 npx expo start
or 
npx expo run:android
and boom you are done