GREENSBORO, NC -- You're heading to that concert you've been waiting all month for and then you see the signs.

20 dollars to park here. 10 dollars to park there.

How do you know where the cheapest place to park is? Money man suggests using

It's a free app for Apple and Android users. You select a city or an airport and it exposes the best prices and compares them side by side.

Greensboro is on the website.