UNDATED (KTHV) - PCWorld writes that your smartphone may your best friend on Black Friday.
Check this out: According to PCWorld, once you update your iPhone's Walmart app, you can see Black Friday-specific store maps and product locations and prices.
In addition, Google Maps for Android also offers store-specific maps and Black Friday deals from a few big department stores like Macy's.
To read more about using your smartphone to its utmost power, just visit PCWorld.com.