Car parking in DC

Today 1st time I used Parkwhiz app. I paid in advance and had no issues. Excellent app to give you an idea, cost wise where to park. Last time I went to Verizon center I paid $20.00 to see the event but this time with the help of this app only $10.00
There cancellation policy is also good though I have not used it yet.

Arun_12345 about ParkWhiz - #1 Parking App