Go the project folder, open the file: src\config\index.js and change host to your WordPress site URL:
android/app/src/main/res/values/strings.xml and change to your App name.
android/app/build.gradle and change to your name own.
We use image size with 750 pixels wide and 1294 pixels tall
android/app/src/main/res/drawable/splash.pngand change to your image.
Don't forget clean cache after change app info.
cd ./android/gradlew clean