For one, the app now shows both "leaked" and confirmed Black Friday ads so you can get the jump on sales that haven't even been announced yet publicly. When you find items you might consider picking up, you can click the list icon in the lower right to save them to your own easily-accessible Shopping List.
You can toggle between individual deals and sales organized by retailer from the buttons at the bottom of the interface, and drill down into retailer sales by category. To look at details more closely or make a purchase, there's a button with each offer to take you to that specific ad in Safari.
The app has a lifespan beyond Black Friday as well, with Cyber Monday and After-Christmas sales rotating in after November 27 along with dealnews-worthy bargains going on year-round.
The Black Friday app is garnering some negative reviews in the App Store for being essentially a mobile version of the regular dealnews site -- but if you're out shopping or otherwise on-the-go that's not necessarily a bad thing. And at the going price of free, bargain hunters might consider the app itself a deal worth trying out.