- The Expo version is the easiest way to start building a new React Native application. It allows you to start a project without installing or configuring any tools to build native code – no Xcode or Android Studio installation required (Expo is the tools which can be download from https://expo.io)

- The Pro version is support to build with react-native-cli via command line (terminal), and it’s include the iOS and Android folder which can build with XCode and Android Studio, the Pro version is easy to add new native component such as OneSignal (react-native-onesignal), Facebook Account Kit (react-native-facebook-account-kit)....

- Below both version could generate as the standalone version and release (.ipa or .apk file) to both AppStore or Google Play stores.

For getting more detail please have a check from: https://facebook.github.io/react-native/docs/getting-started.html

- Full source code project include both Expo & Pro version, made by react native framework

- No website include on the project, but you can use with any Wordpress template