It doesn't look like there is a lot of interest in an app like this. Kinda surprised to be honest.
This will likely be the last update unless I see some interest. Lately I've added a database of large airports which you can use as waypoints by clicking on them. You can also toggle airports visible or not. I've also changed up the ui a bit to make it easier to add features by going with a more "glass cockpit" like feel. I'm pretty happy with it at this point and it's getting pretty solid. I don't have anyone to help me test it though so I can't release it unless I get some help. If anyone is interested please pm me.
here's a couple of screen grabs of the latest