Sony cameras can use apps much like an iPhone.
This app was rather handy, its called smooth reflections app and it does the same job as an ND filter.
It took 3 images stopped down and longish exposure 3.2 secs and stacked them. The resulting image was a lot better than single images taken at the same spot. Being in rainforest and also a partially cloudy day it was rather dim in that gully.
http://www.pbase.com/gregbradley/image/162564402/large
Greg.