According to RustyBruck on MarketingLand.com, Google's released mobile AdSense apps for iOS and Android. So now you don't have to rely on third party alternatives to check your stats.
Available free in the Apple Store and Google Play.
I did notice that yesterday the chrome extension finally caught up to my time zone change, so maybe they were waiting for that.
Anyway - for all of you who've wanted an official mobile app - go download!