As a member of the Royal Astronomical Society of Canada I purchased this app to see if light pollution data and information was provided for any of our Dark Sky preserves and observing sites. And of course there is none. Hope you fix that soon.
Updated Review: After looking through the Light Polution settings I was able to load some data from 1997 for Canada. Not exactly current but it was a good representation. It also had our Blackfoot Observing site in Alberta as well. I will user contribute more sites soon as it is missing some of our Dark Sky Preserves. I do like how it links to Clear Sky Clock too. So overall - Nicely Done.
lancetay about Dark Sky Finder, v1.0