Not great

This is a great app if you are willing to travel the only route available in the app. If you want a set of alternatives, you have to pay extra :/ If you know which alternative you want, you can attempt to place "via-points" (pins) to coax the system to find the route you want, but sometimes this turns the computation into a complex mess. Also, I found at least one error in the toll computation. Hopefully these issues will improve in future updates.

Blakestar12 about Tollsmart Toll Calculator, v1.6.4