Google has introduced official Google Reader App for Android phones. Google Reader is a Web-based aggregator, capable of reading Atom and RSS feeds in a single window. Google Reader App for Android enables Android users to read the RSS feed on their Android phone while they are on a move.
The Google Reader app supports all the basic functionality you expect from a feed reader software – such as unread counts, friends, sharing, liking, and starring. The Android apps also provides support for multiple accounts, synced preferences, subscribe and search from your phone.
Google Reader App is available for free download and is compatible with phones running Donut (Android 1.6) or higher.
Users can subscribe to whichever number of RSS feeds they want to from multiple Gmail account and can read updates from these RSS on their Android Phones. The only requirement a user need to access Google Reader, is a gmail account. Whoever having a gmail account can subscribe to RSS feeds and can read the feeds using Google Reader.
The apps provide many additional features specific to mobile phone users. It provides volume-key navigation, which when enabled in the settings, you can navigate using your phone’s volume keys for next and previous feed items. Long-press on a folder or subscription and bring up a contextual menu that lets you rename, unsubscribe or change folders. You can use the send feature, by pressing the menu key on an individual item. The send feature integrates with other apps on your phone to send the item using any 3rd party app. [source]
The Google Reader app is available on the android on Android Market.