For a 2 dollar app, it is hard to complain. The lasso tool, which dos not work at all on my installation, could have been useful for generating bokeh effects. Otherwise it puts an easy to use UI on some effects that are available in Photoshop but which have a higher learning curve there. It seems prone to crashing so export often. Also, the help function took me to a developer that has nothing to do with the app--perhaps they sold it to the present Chinese company. Who Knows? In any case, for help, you are on your own for now.
GaryFromOR about Big Aperture