Appscars: Which is the Best Shopping App? Voting Ends 2/24 at 9 a.m.

Now that LogMeIn Ignition has won the Appscar for Best Productivity App, we can move on to the Shopping category. Your nominees are as follows: Amazon Mobile, Barcode Scanner, Groupon, ShopKick, and ShopSavvy. Vote now or forever hold your peace.

Amazon Mobile: You no longer need a computer to search, shop, compare prices, read reviews, and make purchases on Amazon.com. You just need this clean and easy-to-use free app for iOS, Android, and BlackBerry. If you have 1-Click set up, it’s just that simple to buy. Amazon customers have full access to existing carts, wish lists, order history, and shipping options. Plus, you still get Prime membership benefits. Our favorite feature is Amazon Remembers, which creates a visual wish list of items that you take pictures of while you’re on the go.

Barcode Scanner: For just $0.99, the hugely popular BahnTech app Barcode Scanner can be your best friend when it comes to finding the best deal possible. To use it, simply point your iOS device’s camera at a barcode. Within seconds, you’ll get links and prices from thousands of online retailers, including Amazon, Best Buy, CompUSA, eBay, Newegg, and Walmart. You can also use this app to create shopping lists and share products you want via Facebook.

Groupon: More deals are being added in new cities all the time, but currently Groupon can get you special group-rate deals in 160 cities. The free app works with iOS, Android, and BlackBerry devices, and it makes it possible to purchase and redeem coupons directly from your phone. Deals range from local attractions to discounts at national retail chains such as Gap and Barnes & Noble. You can even search for Groupons using GPS on your handheld.

ShopKick: Think of Shopkick as the Foursquare of shopping apps. You collect kickbucks for checking into places around you, including well-known retailers such as American Eagle Outfitters, Best Buy, Macy’s, and Sports Authority. You can then redeem those bucks for rewards. Even if you don’t feel like collecting anything, the free Android/iOS app will alert you to special deals (such as getting 15 percent off your entire purchase). For now, the app is limited to 18 cities, including Chicago, Los Angeles, New York, and San Francisco.

Shop Savvy Barcode Scanner: It looks like a regular barcode scanner app at first glance, but ShopSavvy claims its free app has support for more than 20,000 big-name retailers including Best Buy, Target, and Walmart–plus online stores such as Amazon.com and Buy.com. It also features an attractive UI with easy price comparisons for local and web retailers, plus configurable price alerts. A built-in store info database lets you get directions, e-mail links, launch a store’s website, and call the store directly from the Android/iOS app.

The poll is open from now until Thursday, February 24 at 9:00 a.m. Did we forget someone? Feel free to add write-ins in the comments below. Then tune in Thursday for the Best Social Networking App category.