Almost there
This app has the right idea but is a little glitchy. Something I would suggest is the ability to move the pin points one already placed. For example. I’m trying to plot a route that is 2 miles long. I can guess and place a marker but it may be 1.5 miles. Then I have to start the route again. The ability to just remove or pick up the last marker and place it in a new position to keep the same route in motion would save a lot of messing around.