The app doesn’t appear to do anything you wouldn’t expect for such a tool. It overlays with a map and shows you local deals, displays the offers you’ve bought and redeemed, and you can use the coupons directly from your phone.
Unfortunately, not every city is covered by the app. You can only use it in:
Atlanta, Austin, Baltimore, Boston, Brooklyn, Charlotte, Chicago, Columbus, Dallas, Denver, Detroit, Fort Worth, Houston, Indianapolis, Kansas City, Long Beach, Los Angeles, Miami, Milwaukee, Minneapolis, NYC, Philadelphia, Phoenix, Pittsburgh, Portland, Oakland / East Bay, Oklahoma City, Omaha, Orlando, Sacramento, Salt Lake City, San Antonio, San Diego, San Francisco, San Jose, Seattle, St. Paul, St. Louis, Tampa and Washington D.C.