What’s an APK file?

An APK file is the file format used for installing software on the Android operating system, similar to Windows (PC) systems using an .exe file for installing software.

IMPORTANT NOTE:

Before you can install any APK files on your phone, you will need to ensure that third-party apps are allowed on your device.
Go to Menu > Settings > Security > and select “Unknown Sources” to allow your phone to install apps from sources other than the Google Play Store.

How to install the Gone Goose APK file from your Personal Computer

How to install the Gone Goose APK file from your Android device