I'm quite familiar with the situation in Denver. Your criticism is that it doesn't work well if your phone dies. True, but I'm replying to someone suggesting "U

I'm quite familiar with the situation in Denver. Your criticism is that it doesn't work well if your phone dies. True, but I'm replying to someone suggesting "Uber for Public Transit". I presume that involves a app rather than a physical product. It would be kinda neat if we standardized across the country on one app, but it's nowhere near the top of the list of things to address. Most people mostly use one or a small number of public transit systems. You can just have more than one app. Municipalities are also increasingly opening up the payment system such that apps like Google Maps and Transit are able to offer buy ticket buttons.