Not that user friendly

I purchased this app to measure land in acres. The problem is when I drop a pin and need to reposition it, I have to put my finger over the pin in just the right place. My finger then covers the point of the pin that I am trying to place in the exact area I need. I cant see where it is being placed. This app is useless to me and I would like my money back.

Dsalvo about Planimeter — Measure Land Area