I was looking for an app to get good low light photos by slowing down the actual shutter speed of my iPhone camera when I can across this. Initially I was disappointed until I realized exactly what it did! Then I fell in love with it! The pro version offers everything you need to take long exposures of beautiful landscapes or whatever it is youre shooting, and get top quality results out of it. Quite heavy on battery drain, so beware when youre on hikes or away from power for a long time. Has a bug when using crop on either the sharp or blur layer in edit mode, the crop should be disabled if you arent editing the whole pic. Aside from that, great stuff!