The UI for drawing zones in the iOS and iPadOS apps stinks! It is much to difficult to draw zones boundaries accurately. I even tried with an Apple Pencil. It could be much improved by
- allowing the tool to zoom in further, even at the expense of image blurriness (I understand that the satellite imagery used has limited resolution) and
- having a floating drawing toolbox for making edits.
Part of the problem is that most of the time I want to move an anchor point of a polygon representing my zone, I actually move the underlying imagery.