Use this all the time for measuring routes. However, at some point the app got "updated" and the straight line route generation stopped working. Now, when you use the straight line tool, you can only make a single straight line. When you go to make the next line, it resets. Also, should be able to use the straight line tool and free hand tool on a route.
Fix that and its a five star app.
PaterNovem about Map Ruler Touch