MyCongress App for iPad
'MyCongress is a portal to detailed information about your elected U.S. Congressional officials. Track their news, video and Twitter feeds. Look up their official Open Congress profile or contact them directly. MyCongress helps you get in touch with your government.'
***UPDATED FOR 113th CONGRESS***
This app has been recommended by Kathy Schrock as an evaluating tool in Bloom's taxonomy.
This is a free app.