Nearly half of American smartphone owners (47%) used shopping apps in June 2012, according to the latest Nielsen data.  Overall, 45 million smartphone owners used apps in the Shopping/Commerce category, accessing shopping apps 17 times on average during June 2012.

Here are the Top Ten Shopping Apps for the month:

Most of the apps on the list are obvious, but a handul need further explanation:

ShopKick
Shopkick is a shopping rewards program that’s, well, more rewarding. No plastic cards, no confusing rules, no extra steps. You just do what you love doing anyway—walking into your favorite stores like Target, Macy’s, Best Buy, Crate&Barrel, Old Navy, Toys”R”Us, Exxon and Mobil convenience stores, and more—and you automatically rack up über-versatile points called “kicks.” No applications to fill out, and no purchase required. That’s right—you just walk in with your smartphone and instantly earn kicks.

Red Laser
The ultimate Showrooming aid. Wave your smartphone in front of any item’s bar code. The app scans websites and nearby stores to tell you if it’s available for less elsewhere.

Out of Milk Shopping List
Out of Milk is an easy-to-use and intuitive Shopping List, To-Do List and Pantry List app that can be as simple or as detailed as you’d like.