The Bag Tag Breakdown app is currently unavailable to download from from the Google Play Store. Sydney Disc Golf Club has made the installation file (APK) available on this web site. However, to install, you must change a setting to allow installation from unknown sources on your phone.
Follow these instructions to enable “Install Unknown Apps” for your specific Android version. Then open this page in your web browser on your phone and then click the download link below to install the APK file.