Washington DC's number one public transit app, with realtime and schedule information for Metro rail, WMATA/Metro bus, Arlington Transit (ART) and DC Circulator. Plan your trip in the Washington Metropolitan region, including DC, Northern Virginia and Maryland.

Key features include-
Realtime rail predictions for all DC Metro stations.
Realtime and schedule information for all bus stops in the region.
A comprehensive trip planner.
Location based station and stop finder.
An interactive custom system map for Metro.
Save frequently used stop and stations.
Always free.

You must have network access to use these resources.