To install the app, simply download the .apk onto your android phone.
To install this application you must have Unity version "2017.3.0b2" and Vuforia version "vuforia-unity-6-2-10."
Newer versions of Unity with Vuforia integrated cannot be used, as this Vuforia integration does not yet support Word tracking. To set up this legacy environment, first install Unity version "2017.3.0b2." To use this version with Vuforia, download the Unity Extension (Legacy). https://developer.vuforia.com/downloads/sdk