Answers for "how to create release build in react native"

react-native release build

cd android && ./gradlew assembleRelease

build apk react native

After run this in cmd

react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res/

cd android && ./gradlew assembleDebug

then you can get apk app/build/outputs/apk/debug/app-debug.apk

location of release apk in react native

For Windows 'cd android' and then run gradlew assembleRelease command , and find your signed apk under android/app/build/outputs/apk/app-release.apk