A live wallpaper that renders each station in the NYC subway network, and indicates stations with arriving trains with a gradually expanding circle. An arc in the circle rotates clockwise for southbound trains and counter-clockwise for northbound trains. Optionally, a label is rendered that shows the train line, station name, and time of entry. Four color themes are available including one designed specifically for ICS.
Based upon the Transit Sharpener NYC application, which allows for querying of NYC subway data via a "live" map and a station widget.