Speaking of apps, I contacted icheckmovies a while back about and app and they said it was in the works. Looks like it is still not available, but hopefully it is coming soon!
Also, icheckmovies is the only one I use. I took me forever when I joined to go thru all the movies and check the ones I had seen, but since then I love using it just so I know what I've seen and what not. That is really the only feature I am looking for. Would like to use it to catalogue my collection, but just not sure whether it's worth getting the premium and having to pay. I suppose if I did that I would look into utilizing the additional features that come with that as well.