Washington DC Metro SmarTrip

I just returned from ten days in Washington DC, where I got around solely by walking and public transit (bus and train). It was awesomely efficient. One of the more difficult things to suss out prior to visiting was the use of the SmarTrip app . The short summary: you don’t need it if you’re a tourist. Just use the Wallet function. The app does three things: Lets you buy a multi-day pass. The…