My rating of this app.

I use this app faithfully in catching the p17 or p19. It is pretty much on point in the mornings as long as the buses have their gps on. In the evenings at times the times can be off. A times there are phantom times. One minute you see it the next it disappears and the bus doesnt show up. But I say its is at least 85% accurate in the evenings.

M. Lea about Next DC Metro and Bus