I've used several Bus Tracking Apps over the last couple of months but this particular one stands out because of one very useful feature; it can track CTA Trains as well as busses. I've been waiting for a developer to incorporate this feature for a while and this app handles it very well. It is usually accurate to within a minute of a bus arrival and I have come to rely on it daily. It has a very simple interface and runs very smoothly and quickly so you can jump into the app find the arrival info and then pop back out to another app without much effort. Now it has a great feature that allows you to create an alarm for a particular stop so that when you?re jamming out to a great tune or rock'n a sweet game an alarm will sound within two minutes of your stop to prevent an "Oh S@!#! I missed my stop!" moment... Great App!