The app commonly used for Democratic campaign on-ground canvassing, known as MiniVAN, is vetted, works well, and available through proper channels. There is no reason that that couldn't have been the case here. For something as mission-critical as this, the process to obtain the application involved needs to be clear as day. Most Android users do not sideload applications because of the inherent security risks. There are just colossal fuckups all the way down and a clear chain of incompetence at the core of this debacle.