Change App Name In React Native

I'm trying to figure out how to change a ReactNative app name. The installed APK on my device is simply "App", with the Android icon. How can I change this?

I've tried changing package.json and re-running react-native upgrade but it didn't update AndroidManifest.xml

The generator does not override the strings.xml file located in android/app/src/main/res/values/, so you have to change the app_name variable manually

For Android

Modify displayName in app.json file

Modify app_name in android/app/src/main/res/values/strings.xml

then Run these commands one by one

cd android
./gradlew clean
cd ..
react-native run-android

For iOS

Modify Display Name in Project target (General Tab)

Select your application project as Host Application in Project target for testing (General Tab)