This app worked great – when it worked, which was almost never. In theory it does exactly what I need – sense where you are and help you figure out which buses come to where you are, and how far away those buses happened to be.
Unfortunately for almost every bus route I tried to look at, the app would say "sorry an error has occurred" and has no data. It only seem to work for the 66 bus route. For that route, it gave good accurate predictions of when the bus would arrive. But as a way to find routes, or to look at arrival times of other routes, it was completely worthless.
Either the source of the data, or the way this app connects to that source, is not working. This went on for 3–4 weeks before I wrote this review… So it also doesnt seem to be very well-supported.
ModernEsther about ChiTransit: CTA Bus and Train Tracker for Chicago, v3.2