Great app concept, and the geo tagging is very simple. Zooming needs to be improved, however, as you can't zoom in far enough to use the app for accurate navigation.
The support email doesn't work If you get the support email working and actually support the program then I'll review it, but at the moment is doesn't work
1.0.3 Fixed some bugs, and improved the tagging algorithm. Now three points are needed to tag a chart.
1.0.2 Fixed zoom button