When publishing your app you are given multiple file options…
Generate Source Code
> iPhone Version
> iPhone Version (no ads)
> Android Version
> Android APK
Currently, builds are only available for Android due to the extra steps required for Apple. Builds are similar to source code but have already been processed so can be directly uploaded to the Android Play Developer Console without needing to use any additional software, the only reason to download the android source code is if you need to adjust any advanced features (not recommended).
Source code for apple requires the user to import the file into Xcode (free on the macOS store), build and archive the application before uploading to iTunes Connect (Developer Site). Ensure you select the correct iPhone version as your app will be rejected by apple if your app has ads (provided by you or us on our bronze package) and you select iPhone (no ads).