Groupon, Living Social and Foursquare rewards are great ways to get discounts, and now there’s a new app in town that can get you even more great deals.

It’s called Shopkick.  It’s for the iPhone, and it’s meant to make shopping more enjoyable and easier than it’s ever been.

Here’s how it works: You earn “kickbucks” just for walking into stores in New York, Los Angeles, San Francisco, and Chicago (and also some stores in Miami, Dallas, and Minneapolis).  This includes retail stores like Best Buy, Macy’s, American Eagle and Sports Authority.

With Shopkick, you don’t have to manually check in as you do with Foursquare or Gowalla.  Shopkick automatically knows (thank you, geo fencing) when you enter a shop, and it verifies that you’re actually in the store through the sounds it picks up.  You can also win kickbucks by scanning products with your mobile phone.

You can use kickbucks to get discounts, Facebook credits, or Napster song downloads.

Shopkick is free and available for download at the iTunes store.