Talking of apps... Who knew Glenshee had one! Just stumbled across it by searching ski Scotland.
It's been around for a while, I checked it out about a year ago, "scouting the competition". It looks good visually, but doesn't do much. Right now the conditions report page is broken because the script the app communitates with to get the report has been deleted from the Glenshee website. I think all this was doing was iframing a page generated by the server, some of the other information links do this as well.
The Glenshee webcam URL's were changed back in Jan or Feb, but this app is still showing the last shot taken by the old camera in January 2015.
Right now it needs to be fixed or withdrawn.
Cally ski hire has an app as well, but I don't recall it being any better.
However, i'll admit that i'm biased in thinking my app is the best one.