From version AdSense 3.0:
The Google AdSense app provides an easy way to view key data from your AdSense and AdMob accounts. It allows you to access reporting features anywhere, directly from your mobile device. The app provides you with an account overview, as well as access to detailed performance reports on all key metrics. Available reports include: top ad units, channels, sites, countries and more. The account earnings report is also accessible via a resizable widget.
Please note: YouTube revenue and revenue from the legacy AdMob are not available in this app.