Trakt for iOS
Works on iPhone and iPad.
I have to admit, this grew on me until I was actually enjoying it.
It starts slow, and a bit crap but picks up pace about halfway through the season.
I watched the first few episodes then benched the series, only going back to it a few months later out of pure boredom of not finding anything else on Netflix. I am glad I did as it has turned out pretty good by the end of the season.
my advice, stick with it!