WhatMATA

WhatMATA is a simple app that continuously pulls data from WMATA api to give estimate delay times for each DC metro line in each direction.

The delay of a line and direction is displayed using an easy to understand color indicator, with green meaning that the trains are running on time and red meaning that there are severe delays. The delay colors update continuously while the app is open.

You can subscribe to lines to receive notifications on your device from when that line is heavily delayed even when the app is not open.